sofa

from WordNet (r) 3.0 (2006)

sofa
    n 1: an upholstered seat for more than one person [syn: {sofa},
         {couch}, {lounge}]

from The Collaborative International Dictionary of English v.0.48

Sofa \So"fa\, n.; pl. {Sofas}. [Ar. soffah, from saffa to
   dispose in order: cf. F. sofa, It. sof[`a].]
   A long seat, usually with a cushioned bottom, back, and ends;
   -- much used as a comfortable piece of furniture.
   [1913 Webster]

         Let fall the curtains, wheel the sofa round. --Cowper.
   [1913 Webster]

   {Sofa bed}, a sofa so contrived that it may be extended to
      form a bed; -- called also {sofa bedstead}.
      [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

24 Moby Thesaurus words for "sofa":
      bed, bedstead, bunk, chesterfield, couch, davenport, day bed,
      divan, doss, gurney, kip, litter, lounge, love seat, ottoman,
      settee, settle, spoonholder, squab, stretcher, studio couch,
      tete-a-tete, the hay, the sack