The Collaborative International Dictionary of English v.0.48:

Materialistic \Ma*te`ri*al*is"tic\, Materialistical
\Ma*te`ri*al*is"tic*al\, a.
   Of or pertaining to materialism or materialists; of the
   nature of materialism.
   [1913 Webster]

         But to me his very spiritualism seemed more
         materialistic than his physics.          --C. Kingsley.
   [1913 Webster]

   2. Primarily concerned with material objects and worldly
      activities, as contrasted with spiritual, moral or
      philosophical concerns; especially, concerned primarily
      with gaining money and the things that money can buy.
      [PJC]

WordNet (r) 3.0 (2006):

materialistic
    adj 1: marked by materialism [syn: materialistic, mercenary,
           worldly-minded]
    2: conforming to the standards and conventions of the middle
       class; "a bourgeois mentality" [syn: bourgeois,
       conservative, materialistic]

Moby Thesaurus II by Grady Ward, 1.0:

100 Moby Thesaurus words for "materialistic":
   Adamic, Circean, Cyrenaic, Eleatic, Epicurean, Marxian, Marxist,
   Megarian, Philistine, Stoic, animal, animalistic, animist,
   animistic, atomistic, banausic, beastlike, beastly, bestial,
   bodily, breadwinning, brutal, brute, brutish, businesslike, carnal,
   carnal-minded, coarse, commercial, commonsense, cosmotheistic,
   earthly, earthy, eclectic, empirical, eudaemonistic, existential,
   expedient, fallen, fleshly, greedy, gross, hedonic, hedonist,
   hedonistic, humanist, humanistic, hylomorphous, hylotheistic,
   idealistic, instrumentalist, lapsed, material, materialist,
   mechanist, mechanistic, metaphysical, moneymaking, monistic,
   mundane, naturalist, naturalistic, nominalist, nonspiritual,
   orgiastic, panlogistical, pantheistic, physical, positivist,
   positivistic, postlapsarian, practical, pragmatic, pragmatist,
   profane, prosaic, rationalistic, realist, realistic, scholastic,
   secular, sensationalistic, sensual, swinish, syncretistic,
   temporal, terrestrial, theistic, transcendentalist,
   transcendentalistic, unspiritual, utilitarian, vitalistic,
   voluntarist, voluntaristic, workaday, workday, working, worldly,
   yuppy