Main Entry: cal·i·ber

Variant(s): or cal·i·bre \ˈka-lə-bər, British also kə-ˈlē-\

Function: noun

Etymology: Middle French calibre, from Old Italian calibro, from Arabic qālib shoemaker's last

Date: 1567

1 a : degree of mental capacity or moral quality b : degree of excellence or importance
2 a : the diameter of a bullet or other projectile b : the diameter of a bore of a gun usually expressed in hundredths or thousandths of an inch and typically written as a decimal fraction <.32 caliber>
3 : the diameter of a round or cylindrical body; especially : the internal diameter of a hollow cylinder