Source : Webster's Revised Unabridged Dictionary (1913)

Platitude \Plat"i*tude\, n. [F., from plat flat. See {Plate}.]
   1. The quality or state of being flat, thin, or insipid; flat
      commonness; triteness; staleness of ideas of language.

            To hammer one golden grain of wit into a sheet of
            infinite platitude.                   --Motley.

   2. A thought or remark which is flat, dull, trite, or weak; a
      truism; a commonplace.

Source : WordNet®

platitude
     n : a trite or obvious remark [syn: {cliche}, {banality}, {commonplace},
          {bromide}]