1. 
1. 
[syn: cosmetic, decorative, ornamental]
The Collaborative International Dictionary of English v.0.48:
ornamental \or`na*men"tal\, a. [Cf. F. ornemental.]
   Serving to ornament; characterized by ornament; beautifying;
   embellishing.
   [1913 Webster]
         Some think it most ornamental to wear their bracelets
         on their wrists; others, about their ankles. --Sir T.
                                                  Browne.
   [1913 Webster]
WordNet (r) 3.0 (2006):
ornamental
    adj 1: serving an esthetic rather than a useful purpose;
           "cosmetic fenders on cars"; "the buildings were
           utilitarian rather than decorative" [syn: cosmetic,
           decorative, ornamental]
    n 1: any plant grown for its beauty or ornamental value