Definition of open in English English dictionary
- Is part of a predefined collection of subsets of X, that defines a topological space on X
- To bet before any other player has in a particular betting round in a game of poker
After the first two players fold, Julie opens for $5.
- Open or unobstructed space; an exposed location
Wary of hunters, the fleeing deer kept well out of the open, dodging instead from thicket to thicket.
- Which is not closed; accessible; unimpeded; as, an open gate
It was as if his body had gone to sleep standing up and with his eyes open.
- Public knowledge or scrutiny; full view
We have got to bring this company's corrupt business practices into the open.
- To reveal one's hand
Jeff opens his hand revealing a straight flush.
- Actively conducting or prepared to conduct business
Banks are not open on bank holidays.
- Candid, ingenuous, not subtle in character:
The man is an open book.
- To begin a side's innings as one of the first two batsmen
- A sports event in which anybody can contest; as, the Australian Open
- In current use; mapped to part of memory
I couldn't save my changes because another user had the same file open.
- To load into memory for viewing or editing
- Receptive
I am open to new ideas.
- Having a free variable
- Public; as, an open letter, an open declaration
He published an open letter to the governor on a full page of the New York Times.
- To bring up (a topic)
I don't want to open that subject.
- To make something accessible or removing an obstacle to something being accessible
Turn the doorknob to open the door.
- To make accessible to customers or clients
I will open the shop an hour early tomorrow.
- To begin conducting business
The shop opens at 9:00.
- To start (a campaign)
Vermont will open elk hunting season next week.
- To become open
The door opened all by itself.
- a wire that is broken midway
The electrician found the open in the circuit after a few minutes of testing.
- {a} unshut, unclosed, uncovered, plain, clear
- {v} to set open, unlock, divide, explain, begin
- spread out or open from a closed or folded state; "open the map"; "spread your arms"
- a clear or unobstructed space or expanse of land or water; "finally broke out of the forest into the open"
- A break in the continuity of a circuit
- If something is wide open, it is open to its full extent. The child had left the inner door wide open
- tenseness or inhibition; "the clarity and resonance of an open tone"; "her natural and open response" affording unobstructed entrance and exit; not shut or closed; "an open door"; "they left the door open" affording free passage or access; "open drains"; "the road is open to traffic"; "open ranks" used of mouth or eyes; "keep your eyes open"; "his mouth slightly opened" having no protecting cover or enclosure; "an open boat"; "an open fire"; "open sports cars" of a set; containing points whose neighborhood consists of other points of the same set, or being the complement of an open set; of an interval; containing neither of its end points open to or in view of all; "an open protest"; "an open letter to the editor" accessible to all; "open season"; "an open economy" not sealed or having been unsealed; "the letter was already open"; "the opened package lay on the table" not secret; "open plans"; "an open ballot" not brought to a conclusion; subject to further thought; "an open question"; "our position on this bill is still undecided"; "our lawsuit is still undetermined
- display the contents of a file or start an application as on a computer begin or set in action, of meetings, speeches, recitals, etc
- not defended or capable of being defended; "an open city"; "open to attack"
- If you open something such as a bottle, box, parcel, or envelope, you move, remove, or cut part of it so you can take out what is inside. The Inspector opened the packet of cigarettes The capsules are fiddly to open. Open is also an adjective. an open bottle of milk I tore the letter open. Open up means the same as open. He opened up a cage and lifted out a 6ft python
- When a film, play, or other public event opens, it begins to be shown, be performed, or take place for a limited period of time. A photographic exhibition opens at the Royal College of Art on Wednesday + opening open·ing He is due to attend the opening of the Asian Games on Saturday
- "He opened the meeting with a long speech"
- If you do something in the open, you do it out of doors rather than in a house or other building. Many are sleeping in the open because they have no shelter
- To enter upon; to begin; as, to open a discussion; to open fire upon an enemy; to open trade, or correspondence; to open a case in court, or a meeting
- If you open your shirt or coat, you undo the buttons or pull down the zip. I opened my coat and let him see the belt. Open is also an adjective. The top can be worn buttoned up or open over a T-shirt
- If people open something such as a blocked road or a border, or if it opens, people can then pass along it or through it. The rebels have opened the road from Monrovia to the Ivory Coast The solid rank of police officers lining the courtroom opened to let them pass. close Open is also an adjective. We were part of an entire regiment that had nothing else to do but to keep that highway open. Open up means the same as open. As rescue workers opened up roads today, it became apparent that some small towns were totally devastated When the Berlin Wall came down it wasn't just the roads that opened up but the waterways too
- Free to be used, enjoyed, visited, or the like; not private; public; unrestricted in use; as, an open library, museum, court, or other assembly; liable to the approach, trespass, or attack of any one; unprotected; exposed
- Used in the context of general equities Having either buy or sell interest at the indicated price level and side of a preceding trade "Open on the buy/sell side" means looking for buyers/sellers (for someone who is a seller/buyer) Antithesis of clean
- used of mouth or eyes; "keep your eyes open"; "his mouth slightly opened"
- Candid, ingenuous, not subtle in character
- without any attempt at concealment; completely obvious; "open disregard of the law"; "open family strife"; "open hostility"; "a blatant appeal to vanity"; "a blazing indiscretion"
- The price at which a security opened for trading on a given day
- Uttered, as a consonant, with the oral passage simply narrowed without closure, as in uttering s
- Uttered with a relatively wide opening of the articulating organs; said of vowels; as, the än fär is open as compared with the ā in sāy
- Open or unobstructed space; clear land, without trees or obstructions; open ocean; open water
- Not settled or adjusted; not decided or determined; not closed or withdrawn from consideration; as, an open account; an open question; to keep an offer or opportunity open
- The price at which a security opens the trading day Generally, the opening price reflects the previous day's close -- unless extraordinary news or demand to buy or sell have occurred before the market opens
- Free or cleared of obstruction to progress or to view; accessible; as, an open tract; the open sea
- {f} move to an open position; be moved to an open position; begin; clear from obstructions; lead out or into; spread out; unseal; expose; make vulnerable; become receptive; remove restrictions; make accessible; make available
- opened out; "an open newspaper"
- If you open something such as a book, an umbrella, or your hand, or if it opens, the different parts of it move away from each other so that the inside of it can be seen. He opened the heavy Bible The officer's mouth opened, showing white, even teeth. Open is also an adjective. Without warning, Bardo smacked his fist into his open hand His mouth was a little open, as if he'd started to scream. Open out means the same as open. Keith took a map from the dashboard and opened it out on his knees. oval tables which open out to become circular
- To open, or open betting, is simply to make the first bet in a round When everyone checked to me, I figured it was okay to open with middle pair
- If an attitude or situation is in the open or out in the open, people know about it and it is no longer kept secret. The medical service had advised us to keep it a secret, but we wanted it in the open
- display the contents of a file or start an application as on a computer
- To begin; to commence; as, the stock opened at par; the battery opened upon the enemy
- become open; "The door opened"
- In a circuit breaker or other switching device, the state when the switch contacts are apart, the switch is "off," and current cannot flow The opposite of closed
- To disclose; to reveal; to interpret; to explain
- 1 Start up an application and/or make a document visible on the screen - that is, load its contents into memory from a disk Compare import and save 2 Expand a folder or disk into a window by double-clicking on its icon Also see Drag-and-Drop
- receptive to new ideas; "an open mind"; "open to new ideas"
- begin or set in action, of meetings, speeches, recitals, etc ; "He opened the meeting with a long speech"
- To loosen or make less compact; as, to open matted cotton by separating the fibers
- "He opened the meeting with a long speech" start to operate or function or cause to start operating or functioning; "open a business" have an opening or passage or outlet; "The bedrooms open into the hall" ready for business; "the stores are open" not having been filled; "the job is still open" receptive to new ideas; "an open mind"; "open to new ideas" opened out; "an open newspaper" relatively empty of and unobstructed by fences or hedges or headlands or shoals; "in open country"; "the open countryside"; "open waters"; "on the open seas" sincere and free of reserve in expression; "Please be open with me" lax in enforcing laws; "an open town" without undue constriction as from e
- To double-click an icon, or to select an icon then choose “Open” from a menu in order to display a window that contains the information that the icon represents
- not brought to a conclusion; subject to further thought; "an open question"; "our position on this bill is still undecided"; "our lawsuit is still undetermined
- You can use open to describe something that anyone is allowed to take part in or accept. A recent open meeting of College members revealed widespread dissatisfaction A portfolio approach would keep entry into the managerial profession open and flexible. an open invitation
- On the stock exchange, the price at which currencies, shares, or commodities open is their value at the start of that day's trading. Gold declined $2 in Zurich to open at 385.50 In Paris and Milan, the dollar opened almost unchanged. close
- To expand; to spread out; to be disclosed; as, the harbor opened to our view
- Open Game
- A type of chess opening, in which both White and Black move their king's pawn to the fourth rank with their first move
- Open Games
- plural form of Open Game
- Open Specification Promise
- A certain irrevocable promise, made by Microsoft in September 2006, that it will not assert legal rights over certain patents on implementations of an included list of technologies
- Open Specification Promises
- plural form of Open Specification Promise
- Open University
- A UK university offering distance learning taught courses, that are open to people without formal academic qualifications, teaching being by correspondence and online with mostly optional tutorials and for some courses compulsory summer schools. Access to postgraduate research is selective and is primarily taught on campus using traditional methods
- Open University
- A similar university in the Netherlands
- open a can of whoop ass
- A good-humored threat of physical harm
Chan stars in his first all-American production as chan as Hong Kong Detective Inspector Lee, a noble, innocent and caring police officer who can really bust open a can of whoop-ass when given the chance.
- open air museum
- A museum where the exhibitions are located outdoors
- open air museums
- plural form of open air museum
- open and affirming
- Of or pertaining to Christian congregations and other Christian groups that accept gay men and women as well as bisexuals and transgendered people
- open and shut case
- A problem with an easy solution
The carton of milk on the floor. The cat with milk dripping from his chops. It was an open and shut case.
- open and shut cases
- plural form of open and shut case
- open ball
- The set of all points in a metric space whose distance from a given point ("the open ball's center") is less than a given length ("the open ball's radius")
- open bar
- A bar at which drinks are served without charge, usually at a social event
The party included a reception, a dance, and an open bar.
- open beta
- Something that is in its beta stage, or being tested
- open book
- A person who through naivete responds candidly to questions or openly displays their emotions or intentions
Emile's most striking characteristic is that he hides nothing. He is an open book, acting the same in private as in public — Emile is worse at disguising his feelings than any man in the world..
- open book
- An open book decomposition
- open book
- Something of which salient aspects are obvious or easily interpreted
But I have never argued – and never will – that our most sensitive national security matters should be an open book.
- open book decomposition
- A decomposition of a 3-manifold into a link and a fibration over the circle by surfaces bounded by that link
- open book decompositions
- plural form of open book decomposition
- open books
- plural form of open book
- open box
- Pertaining to a product sold by merchants at a discount, because the item was returned but found not to be defective
- open circulatory system
- circulation which is achieved primarily from the heart beating and muscle-induced locomotion of the organism, circulation without veins
- open cluster
- a more or less irregular star cluster containing tens to thousands of stars
- open clusters
- plural form of open cluster
- open compound
- A compound word with spaces in it. For example: hang out, school bus, science fiction
- open compounds
- plural form of open compound
- open content
- Freely distributable and/or able to be edited, added to, and/or repaired
This is an open-content online website.
- open content
- Content which is freely distributable and/or able to be edited, added to, and/or repaired
Many websites are copyrighted and do not have any open content.
- open cover
- A cover whose members are all open sets
- open design
- The collaborative design of things, especially of open source software
- open doors
- To lead to opportunities or (social) advantages
The training that opens doors for you that men from electrical trade schools can never pass.
- open ended straight draw
- Four cards to a straight where cards of two different ranks could complete a straight. (E.g. 4-5-6-7)
- open fire
- To begin firing at something or someone
In warfare, whoever opens fire has a greater chance of victory.
- open floor plan
- An interior of a building constructed with few walls or obstructions, giving a communal aspect
- open game
- Alternative spelling of Open Game
- open goal
- An undefended goal
- open half space
- A half space that does not include the plane that bounds it
- open house
- A house which is for sale and is open for inspection or tour by interested parties. Most houses for sale on the market are open on weekends
- open house
- A casual school event where the school invites parents or guardians to come and tour their child's school, classrooms, and allow them to meet their child's teachers
- open interest
- The number of contracts outstanding between market participants in a futures market or other derivatives market
- open interval
- an interval in the real number line which does not contain its supremum and infimum. If specified by a pair of real numbers, then it consists of all the points on the real line whose values lie strictly between those two real numbers
- open letter
- A letter addressed to one person but published (as for example in a newspaper) for the public to read
- open letters
- plural form of open letter
- open market
- A competitive market where buyers and sellers can operate without restrictions
- open markets
- plural form of open market
- open matte
- Of a soft matte film, transferred to a home video format with the full frame exposed, thus having the theatrical mattes removed
an open matte DVD.
- open mic
- A musical or comedy stage platform with open invitation, that is, where anyone is invited to perform
- open mind
- A mind willing to consider new ideas
- open minds
- plural form of open mind
- open one's big mouth
- To speak about things, when it would be better to stay silent
Grr, why do I always open my big mouth after doing something wrong.
- open outcry
- A trading method whereby traders gather in person, often in a pit, and call out to all their desire to buy or sell a quantity at a given price, transactions being consummated when two parties can agree on a price. Most frequently used in securities markets
- open outsourcing
- A socioeconomic movement resulting from the marriage of the open source movement and the recent trend towards the international outsourcing of programming
- open problem
- A problem that has been posed in a field of study such as mathematics or theoretical computer science, but whose answer is not yet known
- open problems
- plural form of open problem
- open proxy
- a proxy server that may be accessed by any Internet user
- open proxy server
- a proxy server that may be accessed by any Internet user
- open razor
- Another name for a straight razor
- open razors
- plural form of open razor
- open reading frame
- A sequence of DNA triplets, between the initiator and terminator codons, that can be translated into mRNA
- open rectangle
- A rectangle in the real plane which is an open set: i.e., which does not contain its edges. If the sides of the open rectangle are parallel to the plane's axes, then the open rectangle can be described as the Cartesian product of two open intervals
- open sandwich
- Any dish consisting of only one slice of bread, with any topping
- open sea
- That part of the sea out of sight of land
- open seating
- The provision of seating or tables without reservations
- open secret
- A fact that is widely known, but not acknowledged openly
It was an open secret in the profession at that time that Mr. Field had very explicit documentary evidence that would have made Mr. Evarts very uncomfortable had the Bar Association thrown down the gauntlet.
- open secret
- Information that is not widely known, despite being freely available
- open secrets
- plural form of open secret
- open sesame
- Open up!
- open sesame
- Any successful means of achieving a result, especially means that are magical or technical, or otherwise beyond the understanding of most people
When Mussolini was a young chap, he dabbled with socialism, imagining it to be an open sesame to a better society.
- open sesames
- plural form of open sesame
- open set
- Informally, a set such that the target point of a movement by a small amount in any direction from any point in the set is still in the set; exemplified by a full circle without its boundary
- open set
- A set which can be described as an (arbitrary) union of open balls. Equivalently, a set such that for every point in it, there is an open ball centered at that point, such that that open ball is contained by the set
- open set
- Most generally, a member of the topology of a given topological space
- open sets
- plural form of open set
- open source
- Open-source software in general
His contributions to open source are numerous.
- open source
- The practice of providing open-source code for a product
- open source
- To make open-source
- open source religion
- a decentralized religion that is continuously undergoing open source revision by its followers
- open sourced
- Simple past tense and past participle of open source
- open sources
- Third-person singular simple present indicative form of open source
- open sourcing
- Present participle of open source
- open sunshine
- Total outdoor sunshine, without clouds, haze, or other obstruction
- open sunshine
- Used as a metaphor for openness, transparency, public awareness
This change, dubbed the Open Sunshine policy, de-classifies the formerly confidential criteria used to determine the amount of money an organization would receive.
- open system
- A system that can exchange both matter and energy with its surroundings
- open system
- A system allowing hardware and software from different manufacturers to be used together seamlessly
- open the attack
- of a bowler, to bowl one of the first two overs
- open the face
- to turn the face of the bat outwards in order to hit the ball on the off side
- open the kimono
- To reveal details of one's business operations
- open time
- The period of time after an adhesive has been applied and allowed to dry, during which an effective bond can be achieved by joining the two surfaces
- open up
- To open
Retirements have opened up some vacancies.
- open up
- To commence firing weapons
As the convoy entered the pass, we opened up on them with everything we had.
- open up
- To reveal oneself; to become communicative
After three hours of questioning, he finally opened up.
- open valley
- a method of valley construction in which the steep-slope roofing on both sides are trimmed along each side of the valley, exposing the metal valley flashing
- open valleys
- plural form of open valley
- open water
- An expanse of an ocean, sea, or large lake which is distant from shore and devoid of nearby islands or other obstructions
Gaining the more open water, the bracing breeze waxed fresh; the little Moss tossed the quick foam from her bows, as a young colt his snortings.
- open water
- An area of an ocean, sea, lake, or river which is not covered by ice
At the end of June, James Bay was generally open water except for loose ice persisting over its northwestern section.
- open water
- In a river, pond, or other small body of water, an area of surface unobstructed by aquatic vegetation, boulders, and the like, adequate for navigation or swimming
Willet sent the canoe through the open water between the tall reeds.
- open wound
- A wound which pierces the skin (and/or exterior bones), so as to bare flesh and/or internal organs
Open wounds often cause heavy bleading and grave danger of invasive infection.
- open-air
- Taking place outdoors; alfresco
- open-and-shut
- simple and obvious; easily decided
- open-book
- Attributive form of open book
open-book decomposition.
- open-book
- referring to exams in which external resources such as glossaries, study notes, calculators, etc may be used
- open-collar
- Of or pertaining to work that is done from home, especially via the Internet
Far from being some special breed in three-button suits, these hard-working people are blue collar as often as white collar and, increasingly, the open collar workers of the information age.
- open-end fund
- A collective investment scheme which can issue and redeem shares at any time
- open-ended
- adaptable to change
The topic is definitions, but is open-ended really.
- open-ended
- Of a straight draw, made up of four consecutive cards, thus able to be completed by either of two ranks of card
The flop of 3-6-Q gave Brunson an open-ended straight draw with his 4-5 of hearts.
- open-ended
- unrestricted by definite limits
There will be an open-ended discussion.
- open-ended
- permitting a spontaneous or unstructured response
I'll ask you an open-ended question.
- open-eyed
- alert and vigilant
- open-face
- Being a single slice of bread with a topping
- open-faced
- Being a single slice of bread with a topping
- open-faced
- Having an honest and sincere expression
- open-handed
- Generous; giving freely
In an open-handed gesture, he bought drinks for everyone.
- open-hearted
- frank and candidly straightforward
- open-hearted
- generous and kind
- open-hearth
- Describing a reverberatory furnace used to make high-quality steel
- open-hearth
- Designating the steel so produced
- open-minded
- Willing to consider new and different ideas or opinions
- open-mouthed
- Gaping in surprise, wonder or astonishment
- open-mouthed
- With the mouth open
- open-mouthed
- Loudly insistent
- open-plan
- Having large rooms with few dividing barriers such as partitions
- open-source
- To release the source code of
The big Unix company Sun Microsystems bought the code for StarOffice in 1999, and some time afterward they open-sourced as much of it as they could.
- open-source
- Of, or relating to a product which is licensed to permit modifications and redistribution of its source code
Linux is an open-source operating system.
- open border
- A border that enables free movement of people between different jurisdictions with limited or no restrictions to movement
- open cluster
- (Tekstil) A loose, irregular grouping of stars that originated from a single nebula in the arms of a spiral galaxy. Also called galaxy cluster or galactic cluster
- open market operations
- trade of money and securities between a government and the public
- open cluster
- (Astronomi) An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud, and are still loosely gravitationally bound to each other
- open day
- An occasion when an organization such as a school allows people to visit and see what is done there
- open season
- The annual period when restrictions on the killing of certain types of wildlife, especially for sport, are lifted
- open sesame
- Any very successful means of achieving a result
- open-label trial
- (Tıp, İlaç) An open-label trial is a type of clinical trial in which both the researchers and participants know which treatment is being administered
- opener
- The first act in a variety show
- opener
- A batsman who normally plays in the first two positions of an innings
- opener
- The first goal or point scored
- opener
- (in plural openers) Cards of sufficient value to enable a player to open the betting
- opening
- The initial period a show at an art gallery or museum is first opened, especially the first evening
- opening
- A hole; a gap; a crevice
He slipped through an opening in the crowd.
- opening
- A chance to make progress in a game, for example to score a goal
- opening
- The first few moves in a game of chess
John spends two hours a day studying openings, and another two hours studying endgames.
- opening
- describing the first period of play, usually up to the fall of the first wicket; describing a batsman who opens the innings or a bowler who opens the attack
- opening
- A time available for an appointment
If you'd like to make a booking with us, we have an opening at twelve o'clock.
- opening
- Present participle of open
- opening
- An unoccupied employment position
We have an opening in our marketing department.
- opener
- {n} one who or what opens, an interpreter
- opening
- {n} a place opened, breach, way, dawn
- open bite
- (Diş) [MASS NOUN] Lack of occlusion of the front teeth when the jaw is closed normally
- open fire
- turn loose
- open relationship
- An open relationship denotes a relationship (usually between two people) in which participants are free to take other partners; if the couple making this agreement are married, it is an open marriage. While "open relationship" is sometimes used as a synonym for "polyamory" or "polyamorous relationship", these terms are generally differentiated. The "open" in "open relationship" usually refers to the sexual aspect of a non-closed relationship, whereas "polyamory" refers to the extension of a relationship by allowing bonds to form (which may be sexual or otherwise) as additional long term relationships
- open to
- vulnerable or subject to
