caliber
/ˈkæl.ɪ.bə(ɹ)/
Proposed by a contributor, not yet supported by evidence.
Also seen as: calibers
Sense 1
Meaning · English
Diameter of the bore of a firearm, typically measured between opposite lands.
NounRegister: US
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Sense 2
Meaning · English
The diameter of round or cylindrical body, as of a bullet, a projectile, or a column.
NounRegister: US
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Common questions
What does “caliber” mean?
Diameter of the bore of a firearm, typically measured between opposite lands.
Is “caliber” formal or informal?
caliber is generally US.