the.com/calibre

Calibre is the measure of a bullet's diameter, or figuratively, a person's quality and ability.

means The diameter of a gun's bore (or bullet), or figuratively, the measure of someone's ability or quality.

from From French 'calibre,' probably borrowed from Italian 'calibro,' whose own roots are murky — possibly traced back to Arabic 'qālib,' meaning a mold or last for shoemaking, by way of medieval Latin. The word first measured the inside of gun barrels, then widened, as so many technical words do, into measuring the inside of a person's character.

measurement unit
usually the bullet's diameter in hundredths of an inch
spelling split
British calibre, American caliber, same bang
metric flex
9mm is actually about .355 calibre
other meaning
also means quality or distinction, unrelated to guns
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