noun The difference between the thickness of the metal at the mouth and at the breech of a piece of ordnance.
noun A piece of metal placed on the muzzle, or near the trunnions, on the top of a piece of ordnance, to make the line of sight parallel to the axis of the bore.
verb To furnish with a dispart sight.
verb To make allowance for the dispart in (a gun), when taking aim.