Source : Webster's Revised Unabridged Dictionary (1913)

Crest \Crest\, v. t. [imp. & p. p. {Crested}; p. pr. & vb. n.
   {Cresting}.]
   1. To furnish with, or surmount as, a crest; to serve as a
      crest for.

Crested \Crest"ed\ (kr[e^]st"[e^]d), a.
   1. Having a crest.

            But laced crested helm.               --Dryden.

   2. (Zo["o]l.) Having a crest of feathers or hair upon the
      head. ``The crested bird.'' --Dryden.

   3. (Bott.) Bearing any elevated appendage like a crest, as an
      elevated line or ridge, or a tuft. --Gray.

Source : WordNet®

crested
     adj 1: bearing an heraldic device
     2: (of a bird or animal) having a usually ornamental tuft or
        process on the head; often used in combination; "golden
        crested"; "crested iris"; "crested oriole"; "tufted duck";
        "tufted loosestrife" [syn: {topknotted}, {tufted}]
     3: (of a knight's helmet) having a decorative plume [syn: {plumed}]