a person who denies or disbelieves the existence of a supreme being or beings.

Origin of atheist

1565–75; < Greek áthe(os) godless + -ist
Related formsan·ti·a·the·ist, noun, adjectivepro·a·the·ist, noun, adjective

Synonym study Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for atheist

skeptic, pagan, agnostic, heathen, infidel

Examples from the Web for atheist

Contemporary Examples of atheist

Historical Examples of atheist

British Dictionary definitions for atheist



a person who does not believe in God or gods


of or relating to atheists or atheism
Derived Formsatheistic or atheistical, adjectiveatheistically, 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

Word Origin and History for atheist

1570s, from French athéiste (16c.), from Greek atheos "without god, denying the gods; abandoned of the gods; godless, ungodly," from a- "without" + theos "a god" (see Thea).

The existence of a world without God seems to me less absurd than the presence of a God, existing in all his perfection, creating an imperfect man in order to make him run the risk of Hell. [Armand Salacrou, "Certitudes et incertitudes," 1943]
Online Etymology Dictionary, © 2010 Douglas Harper