Source : Webster's Revised Unabridged Dictionary (1913)

Materialist \Ma*te"ri*al*ist\, n. [Cf. F. mat['e]rialiste.]
   1. One who denies the existence of spiritual substances or
      agents, and maintains that spiritual phenomena, so called,
      are the result of some peculiar organization of matter.

   2. One who holds to the existence of matter, as distinguished
      from the idealist, who denies it. --Berkeley.

Source : WordNet®

materialist
     n 1: someone with great regard for worldly possessions
     2: someone who thinks that nothing exists but physical matter
        [syn: {irreligionist}]