The Collaborative International Dictionary of English v.0.48:

Gowned \Gowned\ (gound), p. a.
   Dressed in a gown; clad.
   [1913 Webster]

         Gowned in pure white, that fitted to the shape.
                                                  --Tennyson.
   Gownsman

The Collaborative International Dictionary of English v.0.48:

clothed \clothed\ adj.
   1. wearing clothing. [Narrower terms: adorned(predicate),
      bedecked(predicate), decked(predicate), decked
      out(predicate); appareled, attired, clad, dressed,
      garbed, garmented, habilimented, robed; arrayed,
      panoplied; breeched, pantalooned, trousered;
      bundled-up; caparisoned; cassocked: costumed:
      decent] [Narrower terms: dight] [Narrower terms:
      dressed-up, dressed to the nines(predicate), dressed to
      kill(predicate), dolled up, spruced up, spiffed up]
      [Narrower terms: gowned] [Narrower terms: habited]
      [Narrower terms: heavy-coated] [Narrower terms:
      overdressed] [Narrower terms: petticoated] [Narrower
      terms: red-coated, lobster-backed] [Narrower terms:
      surpliced] [Narrower terms: togged dressed esp in smart
      clothes)] [Narrower terms: turned out] [Narrower terms:
      underdressed] [Narrower terms: uniformed] [Narrower
      terms: vestmented] Also See: adorned, decorated.
      Antonym: unclothed.
      [WordNet 1.5]

   2. covered with or as if with clothes or a wrap or cloak.
      fog-cloaked meadows

   Syn: cloaked, draped, mantled, wrapped.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

gowned
    adj 1: wearing a gown; "beautifully gowned women"