| n. | 1. | ||||||||||
| 1. | (Gunnery) 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; | ||||||||||
| 2. | The diameter of round or cylindrical body, as of a bullet or column. | ||||||||||
| 3. | Fig.: Capacity or compass of mind.
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| Noun | 1. | caliber - a degree or grade of excellence or worth; "the quality of students has risen"; "an executive of low caliber" |
| 2. | caliber - diameter of a tube or gun barrel |