The Collaborative International Dictionary of English v.0.48:

Intermezzo \In`ter*mez"zo\, n. [It. See Intermede.] (Mus.)
   An interlude; an intermede. See Intermede.
   [1913 Webster]

WordNet (r) 3.0 (2006):

intermezzo
    n 1: a short movement coming between the major sections of a
         symphony
    2: a short piece of instrumental music composed for performance
       between acts of a drama or opera
    3: a brief show (music or dance etc) inserted between the
       sections of a longer performance [syn: interlude,
       intermezzo, entr'acte]

Moby Thesaurus II by Grady Ward, 1.0:

105 Moby Thesaurus words for "intermezzo":
   abeyance, act, afterpiece, anacrusis, bass passage, bit, bourdon,
   break, bridge, burden, cadence, caesura, cease-fire, chaser,
   chorus, coda, coffee break, curtain, curtain call, curtain raiser,
   day off, development, divertimento, divertissement, division,
   downtime, drop, epilogue, exode, exodus, exposition,
   expository scene, figure, finale, folderol, half time,
   half-time intermission, harmonic close, hesitation, hoke act,
   holiday, interim, interlude, intermission, intermittence,
   interregnum, interruption, interval, introduction,
   introductory phrase, lapse, layoff, letup, lull, measure, movement,
   musical phrase, musical sentence, number, off-time, ornament, part,
   passage, pause, period, phrase, plateau, point of repose, prologue,
   quiet spell, recess, refrain, relief, remission, resolution,
   respite, response, rest, resting point, ritornello, routine, scene,
   section, shtick, sketch, skit, song and dance, stand-down,
   stand-up comedy act, stanza, statement, stay, strain, striptease,
   suspension, tailpiece, time off, time out, truce, turn, tutti,
   tutti passage, vacation, variation, verse