Real Dictionary

cue
In the theatre or in a musical performance, a performer's cue is something another performer says or does that is a signal for them to begin speaking, playing, or doing something.

cue in American English 1
a bit of dialogue, action, or music that is a signal for an actor's entrance or speech, or for the working of curtains, lights, sound effects, etc.
to give a cue to
noun: anything said or done, on or off stage, that is followed by a specific line or action

cue in American English 2
queue (sense 1)
to braid (hair)
noun: a long, tapering rod, tipped with a soft leather pad, used to strike the ball in billiards, pool, etc
transitive verb: to tie into a queue

cue in American English 3
noun: the letter Q, q

cue in British English 1
noun
verb: to give a cue or cues to (an actor)

cue in British English 2
noun: a long tapered shaft with a leather tip, used to drive the balls
verb: to drive (a ball) with a cue