The last words of a play actor's speech, serving as an intimation for the next succeeding player to speak; any word or words which serve to remind a player to speak or to do something; a catchword.

A hint or intimation.

A signal for action to the production team given by the stage manager on the book (e.g. sound or lighting cues). For actors a cue generally refers to the line by another character immediately preceding their own line.

A prearranged sign that indicates to a performer, crew member or stage technician that it is time to proceed to the next line or action. Actors also listen for cues in the text so that they know when it's time to say or do something.

A straight tapering rod used to impel the balls in playing billiards.

sports implement consisting of a tapering rod used to strike a cue ball in pool or billiards

Cue stick. A delicate instrument, if crafted by a master cue maker, with which the pool player strikes the cue ball.

the stick used for shooting pocket billiards.

a stimulus that provides information about what to do

generally, a synonym for stimulus. A cue occasions or evokes a response. A cue may also form the conditions under which an action occurs. As a term, cue has fewer overtones of a 'goad,' or 'prod,' than the term 'stimulus' has. Cue also better describes the continuous stimuli of multiple schedules of reinforcement. Cue derives from the Latin for "when."

A prompt that directs attention to a particular dimension of a stimulus or task” (Noonan & McCormick, 1993, p. 169).