Diameter of the bore of a firearm. In rifled firearm barrels the calibre is obtained by measuring between opposite lands. A calibre 0.45 revolver has a barrel with a land diameter 45/100 of an inch. The metric equivalent is 11.43 millimeters
Unit of measure used to express the length of the bore of a weapon. The number of calibres is determined by dividing the length of the bore of the weapon, from the breech face of the tube to the muzzle, by the diameter of its bore. A gun tube the bore of which is 40 feet (480 inches) long and 12 inches in diameter is said to be 40 calibers long
cali·bre calibres in AM, use caliber1. The calibre of a person is the quality or standard of their ability or intelligence, especially when this is high. I was impressed by the high calibre of the researchers and analysts
The diameter of the bore, as a cannon or other firearm, or of any tube; or the weight or size of the projectile which a firearm will carry; as, an 8 inch gun, a 12-pounder, a 44 caliber
Originally this referred to a watch movement size, but now it denotes a type of movement (mens calibre, automatic calibre, etc) When a calibre number is accompanied by a manufacturers mark, it indicates origin
Originally used to mean the size of a watch movement, this term now denotes a type of movement (men's calibre, automatic calibre, etc) When a calibre number is accompanied by the manufacturer's mark, it serves as an indication of origin