The Collaborative International Dictionary of English v.0.48:

Decorate \Dec"o*rate\ (d[e^]k"[-o]*r[=a]t), v. t. [imp. & p. p.
   Decorated (d[e^]k"[-o]*r[=a]`t[e^]d); p. pr. & vb. n.
   Decorating (d[e^]k"[-o]*r[=a]`t[i^]ng).] [L. decoratus, p.
   p. of decorare, fr. decus ornament; akin to decere to be
   becoming. See Decent.]
   To deck with that which is becoming, ornamental, or honorary;
   to adorn; to beautify; to embellish; as, to decorate the
   person; to decorate an edifice; to decorate a lawn with
   flowers; to decorate the mind with moral beauties; to
   decorate a hero with honors.
   [1913 Webster]

         Her fat neck was ornamented with jewels, rich bracelets
         decorated her arms.                      --Thackeray.

   Syn: To adorn; embellish; ornament; beautify; grace. See
        Adorn.
        [1913 Webster]

   Decorated style (Arch.), a name given by some writers to
      the perfected English Gothic architecture; it may be
      considered as having flourished from about a. d. 1300 to
      a. d. 1375.
      [1913 Webster]

WordNet (r) 3.0 (2006):

decorate
    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,
         ornament, embellish, beautify]
    2: be beautiful to look at; "Flowers adorned the tables
       everywhere" [syn: deck, adorn, decorate, grace,
       embellish, beautify]
    3: award a mark of honor, such as a medal, to; "He was decorated
       for his services in the military"
    4: provide with decoration; "dress the windows" [syn: dress,
       decorate]