The Collaborative International Dictionary of English v.0.48:

Cue \Cue\ (k[=u]), n. [ OF. coue, coe, F. queue, fr. L. coda,
   cauda, tail. Cf. Caudal, Coward, Queue.]
   1. The tail; the end of a thing; especially, a tail-like
      twist of hair worn at the back of the head; a queue.
      [1913 Webster]

   2. 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.
      [1913 Webster]

            When my cue comes, call me, and I will answer.
                                                  --Shak.
      [1913 Webster]

   3. A hint or intimation.
      [1913 Webster]

            Give them [the servants] their cue to attend in two
            lines as he leaves the house.         --Swift.
      [1913 Webster]

   4. The part one has to perform in, or as in, a play.
      [1913 Webster]

            Were it my cueto fight, I should have known it
            Without a prompter.                   --Shak.
      [1913 Webster]

   5. Humor; temper of mind. [Colloq.] --Dickens.
      [1913 Webster]

   6. A straight tapering rod used to impel the balls in playing
      billiards.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cue \Cue\, v. t.
   To form into a cue; to braid; to twist.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cue \Cue\, n. [From q, an abbreviation for quadrans a farthing.]
   A small portion of bread or beer; the quantity bought with a
   farthing or half farthing. [Obs.]
   [1913 Webster]

   Note: The term was formerly current in the English
         universities, the letter q being the mark in the
         buttery books to denote such a portion. --Nares.
         [1913 Webster]

               Hast thou worn
               Gowns in the university, tossed logic,
               Sucked philosophy, eat cues?       --Old Play.
         [1913 Webster]

WordNet (r) 3.0 (2006):

cue
    n 1: an actor's line that immediately precedes and serves as a
         reminder for some action or speech
    2: evidence that helps to solve a problem [syn: clue, clew,
       cue]
    3: a stimulus that provides information about what to do [syn:
       discriminative stimulus, cue]
    4: sports implement consisting of a tapering rod used to strike
       a cue ball in pool or billiards [syn: cue, cue stick,
       pool cue, pool stick]
    v 1: assist (somebody acting or reciting) by suggesting the next
         words of something forgotten or imperfectly learned [syn:
         prompt, remind, cue]

Moby Thesaurus II by Grady Ward, 1.0:

182 Moby Thesaurus words for "cue":
   actor, advice, agate, aide-memoire, alerting, antagonist, antihero,
   ball, baseball bat, bat, battledore, bauble, bit, bit part, blocks,
   book, braid, broad hint, brush, bun, cast, catchword, cauda,
   caudal appendage, caudation, caution, character, checkerboard,
   chessboard, chignon, club, clue, cockhorse, coil, continuity,
   cricket bat, cue word, dock, doll, doll carriage, evidence,
   fantail, fat part, feeder, flapper, frame, frame of mind,
   gentle hint, gesture, gewgaw, gimcrack, glimmer, glimmering,
   golf club, heart, heavy, hero, heroine, hint, hobbyhorse, hot lead,
   humor, implication, index, indication, ingenue, inkling, innuendo,
   insinuation, intimation, jack-in-the-box, jacks, jackstones,
   jackstraws, jogger, key, key word, kick, kickshaw, knickknack,
   knot, lead, lead role, leading lady, leading man, leading woman,
   libretto, lines, look, marble, marionette, memorandum, mig, mind,
   monition, mood, morale, nod, note, nudge, office, paper doll, part,
   passing word, person, personage, pick-up sticks, piece, pigtail,
   pinwheel, plait, playbook, plaything, pointer, prompt, prompter,
   prompting, protagonist, puppet, queue, racket, rag doll, rattail,
   remembrance, remembrancer, reminder, rocking horse, role, scenario,
   scene plot, scent, score, script, shooting script, side, sign,
   signal, soubrette, spirit, spirits, spoor, sport, state of mind,
   steelie, steer, straight part, stub, suggestion,
   supporting character, supporting role, suspicion, symptom, tail,
   tailpiece, taw, teetotum, telltale, temper, text, tickler, tip,
   tip-off, title role, tone, top, topknot, toy, toy soldier, trace,
   track, trinket, twist, vein, vestige, villain, walk-on,
   walking part, warning, whiff, whim-wham, whisper, wink