Source : Webster's Revised Unabridged Dictionary (1913)

Carillon \Car"il*lon\, n. [F. carillon a chime of bells,
   originally consisting of four bells, as if fr.. (assumed) L.
   quadrilio, fr. quatuer four.]
   1. (Mus.) A chime of bells diatonically tuned, played by
      clockwork or by finger keys.

   2. A tune adapted to be played by musical bells.

Source : WordNet®

carillon
     n 1: set of bells hung in a bell tower
     2: playing a set of bells that are (usually) hung in a tower
        [syn: {bell ringing}, {carillon playing}]
     [also: {carillonning}, {carillonned}]