The Collaborative International Dictionary of English v.0.48:

decor \decor\, d'ecor \d['e]cor\n. [Fr. d['e]cor, fr. d['e]corer
   to decorate, fr. L decorare. See decorate.]
   1. the layout, style, and furnishings of a livable interior.

   Syn: interior decoration.
        [WordNet 1.5 +PJC]

   2. Decoration[2].
      [PJC]

   3. (Theater) A stage setting. --MW10
      [PJC]

WordNet (r) 3.0 (2006):

decor
    n 1: decoration consisting of the layout and furnishings of a
         livable interior [syn: interior decoration, decor]