Chokebore

Webster's Dictionary of the English Language

·add. ·vt To provide with a chokebore.

II. Chokebore ·add. ·noun A shotgun that is made with such a bore.

III. Chokebore ·add. ·noun In a shotgun, a bore which is tapered to a slightly smaller diameter at a short distance (usually 2/ to 3 inches) to the rear of the muzzle, in order to prevent the rapid dispersion of the shot.