cue (Noun) — A stimulus that provides information about what to do.
cue (Noun) — An actor's line that serves as a signal for some following action or speech.
cue (Noun) — Sports implement consisting of a tapering rod used to strike a cue ball in pool or billiards.
cue (Verb) — Assist (somebody acting or reciting) by suggesting the next words of something forgotten or imperfectly learned.
cue (Verb) — (pool, billiards, etc) take aim at the cue ball and hit it with the cue.