Degree of excellence or the internal diameter of a gun
Derived from the English word referring to the quality of someone's character or the level of their ability. It also has technical roots in measuring the bore of a firearm, originating from the French 'calibre' and likely the Arabic 'qalib', meaning a mold for casting metal.
Less common today
Caliber isn't in the latest US Top 1000. It last peaked at #4,086 in 2016.
US births per 5-year period, 1990βpresent (SSA data).