The Collaborative International Dictionary of English v.0.48:

Triviality \Triv`i*al"i*ty\, n.; pl. Trivialities. [Cf. F.
   trivialit['e]]
   1. The quality or state of being trivial; trivialness.
      [1913 Webster]

   2. That which is trivial; a trifle.
      [1913 Webster]

            The philosophy of our times does not expend itself
            in furious discussions on mere scholastic
            trivialities.                         --Lyon
                                                  Playfair.
      [1913 Webster]

WordNet (r) 3.0 (2006):

triviality
    n 1: the quality of being unimportant and petty or frivolous
         [syn: pettiness, triviality, slightness, puniness]
    2: a detail that is considered insignificant [syn:
       technicality, trifle, triviality]
    3: something of small importance [syn: triviality, trivia,
       trifle, small beer]