1 (plural usually same) a large, heavy piece of artillery, typically mounted on wheels, formerly used in warfare: they would cross at the Town ford, under cover of the defending cannon a heavy automatic gun that fires shells from an aircraft or tank: the gunships blasted arms depots with 105 mm cannon fire and rockets 2 Billiards
, chiefly British a stroke in which the cue ball strikes two balls successively.
[ early 19th century
: alteration of carom
3 Engineering a heavy cylinder or hollow drum that is able to rotate independently on a shaft. 1collide with something forcefully or at an angle:the couple behind almost cannoned into us his shot cannoned off the crossbar
& Snooker make a cannon shot.