Definition of Calibre

1. Noun. A degree or grade of excellence or worth. "An executive of low caliber"

Exact synonyms: Caliber, Quality
Specialized synonyms: High Quality, Superiority, Inferiority, Low Quality
Generic synonyms: Degree, Grade, Level
Attributes: Superior, Inferior
Derivative terms: Qualify, Qualify, Qualify

2. Noun. Diameter of a tube or gun barrel.
Exact synonyms: Bore, Caliber, Gauge
Generic synonyms: Diam, Diameter
Derivative terms: Bore, Calibrate

Definition of Calibre

1. Noun. Diameter of the bore of a firearm, typically measured between opposite lands. ¹

2. Noun. The diameter of round or cylindrical body, as of a bullet, a projectile, or a column. ¹

3. Noun. A nominal name for a cartridge type, which may not exactly indicate its true size and may include other measurements such as cartridge length or black powder capacity. Eg 7.62x39 or 38.40. ¹

4. Noun. 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. ¹

5. Noun. (figuratively) Relative size, importance, magnitude. ¹

6. Noun. (figuratively) Capacity or compass of mind. ¹

7. Noun. (dated): Degree of importance or station in society. ¹

¹ Source:

Definition of Calibre

1. caliber [n -S] : CALIBRED [adj] - See also: caliber

Medical Definition of Calibre

1. The diameter of a hollow tubular structure. (07 Apr 1998)

Calibre Pictures

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Lexicographical Neighbors of Calibre

calibrated focal length
calibre (current term)
calices renales majores
calices renales minores

Literary usage of Calibre

Below you will find example usage of this term as found in modern and/or classical literature:

1. A Text book of physiology by Michael Foster (1894)
"During this contraction, which has the slow character belonging to the contractions of all plain muscle, the calibre of the vessel is diminished. ..."

2. The Dictionary of National Biography by Sidney Lee (1909)
"Ten years later, in 1869 (that is, just twelve years after Whitworth had first suggested the '45 calibre), a similar committee reported that a rifle with ..."

3. A Text Book of Physiology by Michael Foster (1893)
"During this contraction, which has the »low character belonging to the contractions of all plain muscle, the calibre of the vessel is diminished. ..."

4. The American Journal of the Medical Sciences by Southern Society for Clinical Investigation (U.S.) (1881)
"It terminates abruptly, preserving its calibre to the end, and its wall at this point is but little thicker than elsewhere. All its brandies, except the ..."

5. The Knickerbocker: Or, New-York Monthly Magazine by Charles Fenno Hoffman, Timothy Flint, Lewis Gaylord Clark, Kinahan Cornwallis, John Holmes Agnew (1860)
"1.25 do. do. for Belt " • - - - . ... i.oo do. do. for Pocket and New Model Pistols, each, ...... .30 RIFLES. Mew Model Steel Mounting!, Six Shots, calibre ..."

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