Other forms: calibres
Calibre is the width of the barrel, and so of the round. A large calibre, calibre of the weapon, small-calibre rifle.
It is measured across the bore, in millimetres or in hundredths of an inch, which is why the same round has two names in two systems. Of a person, calibre means quality — a candidate of real calibre — and that is much the commoner use. Note the American spelling caliber.
1nouncalibreThe width of a gun barrel and its round.
“Police found a small-calibre bullet at the scene of the shooting.”
2nounqualityThe quality of a person.
“We need more teachers of her calibre in this school.”
calibre is a measurement, or a quality.
Also accepted in games: caliber
Practised in Military & Defence