atheist Meaning, Definition & Usage

  1. noun someone who denies the existence of god
  2. adjective related to or characterized by or given to atheism
    atheistical; atheistic.
    • atheist leanings

WordNet

A"the*ist noun
Etymology
Gr. without god; priv. + god: cf. F. athéiste.
Definitions
  1. One who disbelieves or denies the existence of a God, or supreme intelligent Being.
  2. A godless person. Obs. Syn. -- Infidel; unbeliever. See Infidel.

Webster 1913