Ma‐te″ri‐al‐ist (mȧ‐tē″rĭ‐al‐ĭst), n. [Cf. F. matérialiste.] 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.