Source : Webster's Revised Unabridged Dictionary (1913)

Ornament \Or"na*ment\, n. [OE. ornement, F. ornement, fr. L.
   ornamentum, fr. ornare to adorn.]
   That which embellishes or adorns; that which adds grace or
   beauty; embellishment; decoration; adornment.

         The ornament of a meek and quiet spirit. --1 Pet. iii.
                                                  4.

         Like that long-buried body of the king Found lying with
         his urns and ornaments.                  --Tennyson.

Ornament \Or"na*ment\, v. t. [imp. & p. p. {Ornamented}; p. pr.
   & vb. n. {Ornamenting}.]
   To adorn; to deck; to embellish; to beautify; as, to ornament
   a room, or a city.

   Syn: See {Adorn}.

Source : WordNet®

ornament
     n : something used to beautify [syn: {decoration}, {ornamentation}]
     v 1: make more attractive by adding ornament, colour, etc.;
          "Decorate the room for the party"; "beautify yourself
          for the special day" [syn: {decorate}, {adorn}, {grace},
           {embellish}, {beautify}]
     2: be an ornament to; "stars ornamented the Christmas tree"