1. Noun: Also cue stick . A cue stick (or simply cue , more specifically pool cue , snooker cue , or billiards cue ), is an item of sporting equipment essential to the games of pool, snooker and carom billiards . It is used to strike a ball, usually the cue ball . Cues are tapered sticks, typically about 58 inches (1.5 m) long and 1821 ounces (510600 g) for pool (shorter for carom and longer for snooker , and lighter for both). Most cues are made of wood , but occasionally the wood is covered or bonded with other materials including, graphite, carbon fiber or fiberglass. An obsolete term for a cue , used from the 16th to early 19th centuries, is billiard stick .

2. Noun: Sometimes "cue" is short for cue ball .
3. Verb: Same as stroke , definition 1