Caliber vs. Calibur

Calibernoun

standard spelling of calibre|from=American spelling

Calibur

Misspelling of caliber.

Calibernoun

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.

‘The caliber of empty tubes.’; ‘A battery composed of three guns of small caliber.’;

Calibernoun

The diameter of round or cylindrical body, as of a bullet or column.

Calibernoun

Fig.: Capacity or compass of mind.

Calibernoun

a degree or grade of excellence or worth;

‘the quality of students has risen’; ‘an executive of low caliber’;

Calibernoun

diameter of a tube or gun barrel

Caliber

In guns, particularly firearms, caliber (or calibre in British English; sometimes abbreviated as ) is the specified nominal internal diameter of the gun barrel bore - regardless of how or where the bore is measured and whether the finished bore matches that specification. It is measured in inches or in millimeters.

‘cal’;