The Collaborative International Dictionary of English v.0.48:

Luxurious \Lux*u"ri*ous\, a. [L. luxuriosus: cf. F. luxurieux.
   See Luxury.]
   Of or pertaining to luxury; ministering to luxury; supplied
   with the conditions of luxury; as, a luxurious life; a
   luxurious table; luxurious ease. " Luxurious cities. "
   --Milton. -- Lux*u"ri*ous*ly, adv. -- Lux*u"ri*ous*ness,
   n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

luxurious
    adj 1: displaying luxury and furnishing gratification to the
           senses; "an epicurean banquet"; "enjoyed a luxurious
           suite with a crystal chandelier and thick oriental rugs";
           "Lucullus spent the remainder of his days in voluptuous
           magnificence"; "a chinchilla robe of sybaritic
           lavishness" [syn: epicurean, luxurious, luxuriant,
           sybaritic, voluptuary, voluptuous]
    2: rich and superior in quality; "a princely sum"; "gilded
       dining rooms" [syn: deluxe, gilded, grand, luxurious,
       opulent, princely, sumptuous]

Moby Thesaurus II by Grady Ward, 1.0:

183 Moby Thesaurus words for "luxurious":
   Babylonian, Corinthian, Cyrenaic, abounding in riches, affluent,
   appealing, appetitive, arabesque, attractive, awe-inspiring, awful,
   barbaric, baroque, bent on pleasure, bewitching, big-rich, busy,
   captivating, charming, chichi, comfortable, comfy, commodious,
   contented, convenient, costly, cozy, cushioned, cushiony, cushy,
   dear, dear-bought, delightful, deluxe, disgustingly rich, easeful,
   easy, elaborate, elegant, enchanting, engaging, enravishing,
   enthralling, entrancing, epicurean, expensive, exquisite,
   extravagant, fancy, fascinating, fat, fetching, fine, flamboyant,
   florid, flowery, flush, friendly, frightfully rich, frilly, fussy,
   glorious, gorgeous, gourmet, grand, grandiose, heart-robbing,
   hedonistic, high, high-priced, high-wrought, homelike, homely,
   homey, imposing, impressive, in funds, in the money, independent,
   independently rich, independently wealthy, intriguing, inviting,
   irresistible, labored, languishing, languorous, lavish, lived-in,
   loaded, lovely, luscious, lush, luxuriant, luxury-loving,
   made of money, magnificent, majestic, moneyed, moresque, noble,
   not affordable, of great cost, oofy, opulent, ornate, ostentatious,
   overelaborate, overelegant, overlabored, overworked, overwrought,
   palace, palatial, pampered, peaceful, picturesque, pleasure-bent,
   pleasure-seeking, plush, plushy, posh, precious, premium,
   prepossessing, pretentious, pretty-pretty, pricey, princely,
   prosperous, proud, provided for, ravishing, relaxing, reposeful,
   restful, rich, rich as Croesus, ritzy, rococo, rolling in money,
   roomy, self-indulgent, sensual, sensuous, showy, snug, soft,
   splendacious, splendid, splendiferous, stately, steep, stiff,
   sumptuous, superb, superfancy, superfine, swank, swanky, swell,
   sybaritic, taking, tantalizing, tempting, thrilling, titillative,
   top, unchaste, unpayable, voluptuary, voluptuous,
   wallowing in wealth, warm, wealthy, well provided for, well-fixed,
   well-heeled, well-off, well-to-do, winning, winsome, witching