The distance around the inside of a gun barrel measured in thousands of an inch. Bullets are labeled by what caliber gun they fit.   Campaign: A series of military operations that form a distinct phase of the War (such as the Shenandoah Valley Campaign).

1560s, "degree of merit or importance," a figurative use from Middle French calibre (late 15c.), apparently ultimately from Arabic qalib "a mold for casting." Arabic also used the [..]

1. A term used to designate the specific cartridge(s) for which a firearm is chambered.2. Firearms: The approximate diameter of the circle formed by the tops of the lands of a rifled barrel, often expressed in hundreths of an inch (“.38 Caliber”) or millimeters (“7mm Caliber).3. Ammunition: A numerical term included in a cartridge name to indicate [..]

The nominal diameter of a projectile of a rifled firearm or the diameter between lands in a rifled barrel. In this country, usually expressed in hundreds of an inch; in Great Britain in thousandths; in Europe and elsewhere in millimeters.

(n) a degree or grade of excellence or worth(n) diameter of a tube or gun barrel

A descriptive term for the size and configuration of the movement of a watch, its shape and its origin

Also known as calibre, the caliber is the size or style of a watch movement.

The diameter of the bore of a barrel measured from land to land, usually measured in tenths of an inch or in millimeters. It does not designate the actual diameter of a bullet.

A term used to differentiate different types of movements made by the same manufacturer.

Sometimes spelled “calibre,” a caliber is a letter and number combination code that typically denotes the manufacturer and movement type of a watch.

The diameter of the bullet (to be used with a specific weapon). See also bore

Caliber refers to the size of a bullet and also the barrel of a gun. Specifically, caliber refers to the diameter of the bullet or the inside of the barrel. Read more about bullet caliber and bullet sizes here

The internal diameter of a gun barrel.

The diameter (usually expressed in centimeters, millimeters or inches) of a gun or the rounds it fires.