The Collaborative International Dictionary of English v.0.48:

Plush \Plush\, n. [F. pluche, peluche (cf. It. peluzzo), fr. L.
   pilus hair. See pile hair, and cf. Peruke.]
   A textile fabric with a nap or shag on one side, longer and
   softer than the nap of velvet. --Cowper.
   [1913 Webster]

WordNet (r) 3.0 (2006):

plush
    adj 1: characterized by extravagance and profusion; "a lavish
           buffet"; "a lucullan feast" [syn: lavish, lucullan,
           lush, plush, plushy]
    n 1: a fabric with a nap that is longer and softer than velvet

Moby Thesaurus II by Grady Ward, 1.0:

86 Moby Thesaurus words for "plush":
   Babylonian, Corinthian, awe-inspiring, awful, barbaric, blubber,
   breeze, butter, classy, clay, costly, cottony, cushion, deluxe,
   dough, down, eiderdown, elaborate, elegant, extravagant, fancy,
   feather bed, feathers, fine, fleece, floss, flue, fluff, foam,
   glorious, grand, grandiose, imposing, impressive, kapok, lavish,
   luscious, lush, luxuriant, luxurious, magnificent, majestic, noble,
   opulent, palatial, pillow, plushy, posh, princely, proud, pudding,
   puff, putty, regal, rich, ritzy, rubber, satin, satinlike, satiny,
   sericeous, silk, silken, silklike, silky, soft as silk,
   splendacious, splendid, splendiferous, stately, sumptuous, superb,
   superfancy, superfine, swank, swanky, swansdown, swell,
   thistledown, velutinous, velvet, velvetlike, velvety, wax, wool,
   zephyr