Source : Webster's Revised Unabridged Dictionary (1913)

Entr'acte \En`tr'acte"\, n. [F. Cf. {Interact}.]
   1. The interval of time which occurs between the performance
      of any two acts of a drama.

   2. A dance, piece of music, or interlude, performed between
      two acts of a drama.

Source : WordNet®

entr'acte
     n 1: the interlude between two acts of a play
     2: a brief show (music or dance etc) performed between the
        sections of another performance [syn: {interlude}, {intermezzo}]