calibre Definition

calibre
noun

1. The internal diameter of a gun barrel or tube.

Thesaurus: measurement, bore, diameter, gauge, measure, scope, size.
2. The outer diameter of a bullet, shell or other projectile.
3. Quality; standard; ability.

Thesaurus: character, ability, gifts, talent, endowment, worth, merit, quality, distinction, stature.

Etymology: 16c: from French calibre, probably from Arabic qalib mould.