n. In billiards, the hitting of two or three balls in succession by the cue-ball from one stroke of the cue: in Great Britain sometimes called cannon. Also spelled carrom.In billiards, to make a carom (which see).To strike or collide against a thing and then rebound or glance off again; cannon: usually with on, and common in racing slang: as, Eclipse caromed on High-flyer and injured his chance of winning.Also spelled carrom.