Source : Webster's Revised Unabridged Dictionary (1913)

Bagatelle \Bag`a*telle"\, n. [F., fr. It. bagatella; cf. Prov.
   It. bagata trifle, OF. bague, Pr. bagua, bundle. See {Bag},
   n.]
   1. A trifle; a thing of no importance.

            Rich trifles, serious bagatelles.     --Prior.

   2. A game played on an oblong board, having, at one end, cups
      or arches into or through which balls are to be driven by
      a rod held in the hand of the player.

Source : WordNet®

bagatelle
     n 1: a light piece of music for piano
     2: something of little value or significance [syn: {fluff}, {frippery},
         {frivolity}]
     3: a table game in which short cues are used to knock balls
        into holes that are guarded by wooden pegs; penalties are
        incurred if the pegs are knocked over [syn: {bar billiards}]