a mounted gun for firing heavy projectiles; a gun, howitzer, or mortar.

British Machinery . quill ( def. 10 ) .

Armor . a cylindrical or semicylindrical piece of plate armor for the upper arm or forearm; a vambrace or rerebrace.

Also called cannon bit, canon bit. a round bit for a horse.

the part of a bit that is in the horse's mouth.

(on a bell) the metal loop by which a bell is hung.

Zoology .

cannon bone.

the part of the leg in which the cannon bone is situated.

British . a carom in billiards.

Underworld Slang . a pickpocket.

to discharge cannon.

British . to make a carom in billiards.

noun

big bertha , heavy artillery , howitzer , long tom , mortar , [[ordnancenotes:a cannon is a large mounted artillery gun or a large artillery gun that is on wheels that fires heavy projectiles while a canon is an ecclesiastical law or code of laws established by a church council or a priest who is a member of a cathedral chapter]] , artillery , ball , bastard , bit , crack , firearm , gun , ordnance , pickpocket , pompom , thief