The Collaborative International Dictionary of English v.0.48:

Deck \Deck\ (d[e^]k), v. t. [imp. & p. p. Decked (d[e^]kt); p.
   pr. & vb. n. Decking.] [D. dekken to cover; akin to E.
   thatch. See Thatch.]
   1. To cover; to overspread.
      [1913 Webster]

            To deck with clouds the uncolored sky. --Milton.
      [1913 Webster]

   2. To dress, as the person; to clothe; especially, to clothe
      with more than ordinary elegance; to array; to adorn; to
      embellish.

   Syn: adorn, decorate, grace, embellish, ornament, beautify.
        [1913 Webster]

              Deck thyself now with majesty and excellency.
                                                  --Job xl. 10.
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              And deck my body in gay ornaments.  --Shak.
        [1913 Webster]

              The dew with spangles decked the ground. --Dryden.
        [1913 Webster]

   3. To furnish with a deck, as a vessel.
      [1913 Webster]

   4. to knock down (a person) with a forceful blow; as, He
      decked his opponent with a single punch.

   Syn: coldcock, dump, knock down, floor.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

decked \decked\ adj.
   clothed or adorned with finery.

   Syn: adorned(predicate), bedecked(predicate)(predicate),
        decked out(predicate).
        [WordNet 1.5]