injection (a mapping which takes no two points in the preimage to the same point in the image) or a bijection
Involving direct communication between two people. Used especially to refer to situations in which one person is teaching one other person
used of relations such that each member of one set is associated with one member of a second set
If there is a one-to-one match between two sets of things, each member of one set matches a member of the other set. In English, there is not a consistent one-to-one match between each written symbol and each distinct spoken sound
In a one-to-one relationship, one person deals directly with only one other person. one-to-one training. negotiating on a one-to-one basis. One-to-one is also an adverb. She would like to talk to people one to one