[ ey-thee-ist ]
See synonyms for atheist on
  1. a person who does not believe in the existence of a supreme being or beings.

  2. a person who believes that there is no supreme being or beings.

Origin of atheist

First recorded in 1565–75; from Greek áthe(os) “godless” + -ist;see a-6, theo-

synonym study For atheist

See agnostic.

Other words from atheist

  • an·ti·a·the·ist, noun, adjective
  • pro·a·the·ist, noun, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use atheist in a sentence

British Dictionary definitions for atheist


/ (ˈeɪθɪˌɪst) /

  1. a person who does not believe in God or gods

  1. of or relating to atheists or atheism

Derived forms of atheist

  • atheistic or atheistical, adjective
  • atheistically, adverb

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012