atheist.
A person who does not believe in deities or gods.
Meaning & usage
A person who does not believe in deities or gods.
A person who does not believe in deities or gods. A person who is certain that no deities exist or who thinks that the existence of deities can be disproven.
A person who does not believe in deities or gods. A person who doubts the existence of deities (therefore, an agnostic may be considered an atheist).
A person who does not believe in deities or gods. Any person lacking belief in deities (including children who are unaware of religion).
A person who does not believe in a particular deity (but may believe in another deity).
A person who does not believe in any religion (not even a religion without gods); a nonreligious person.
Where this word comes from
Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Hellenic *ə- Ancient Greek ἀ- (a-)der. English a- Proto-Indo-European *dʰeh₁- Proto-Indo-European *-s Proto-Indo-European *dʰéh₁s Proto-Indo-European *dʰh₁sós Proto-Hellenic *tʰehós Ancient Greek θεός (theós) Proto-Indo-European *-id- Proto-Indo-European *-yéti Proto-Indo-European *-idyéti Proto-Hellenic *-íd͏̌d͏̌ō Ancient Greek -ῐ́ζω (-ĭ́zō) Proto-Hellenic *-tās Ancient Greek -τής (-tḗs) Ancient Greek -ῐστής (-ĭstḗs)bor. Latin -istader. Old French -istebor. Middle English -ist English -ist English theist English atheist From Middle French athéiste (athée + -iste), from Latin atheos, from Ancient Greek ἄθεος (átheos, “godless, without god”), from ἀ- (a-, “without”) + θεός (theós, “god”).
Of or relating to atheists or atheism; atheistic.
Where this word comes from
Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Hellenic *ə- Ancient Greek ἀ- (a-)der. English a- Proto-Indo-European *dʰeh₁- Proto-Indo-European *-s Proto-Indo-European *dʰéh₁s Proto-Indo-European *dʰh₁sós Proto-Hellenic *tʰehós Ancient Greek θεός (theós) Proto-Indo-European *-id- Proto-Indo-European *-yéti Proto-Indo-European *-idyéti Proto-Hellenic *-íd͏̌d͏̌ō Ancient Greek -ῐ́ζω (-ĭ́zō) Proto-Hellenic *-tās Ancient Greek -τής (-tḗs) Ancient Greek -ῐστής (-ĭstḗs)bor. Latin -istader. Old French -istebor. Middle English -ist English -ist English theist English atheist From Middle French athéiste (athée + -iste), from Latin atheos, from Ancient Greek ἄθεος (átheos, “godless, without god”), from ἀ- (a-, “without”) + θεός (theós, “god”).
To make someone an atheist.
Where this word comes from
Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Hellenic *ə- Ancient Greek ἀ- (a-)der. English a- Proto-Indo-European *dʰeh₁- Proto-Indo-European *-s Proto-Indo-European *dʰéh₁s Proto-Indo-European *dʰh₁sós Proto-Hellenic *tʰehós Ancient Greek θεός (theós) Proto-Indo-European *-id- Proto-Indo-European *-yéti Proto-Indo-European *-idyéti Proto-Hellenic *-íd͏̌d͏̌ō Ancient Greek -ῐ́ζω (-ĭ́zō) Proto-Hellenic *-tās Ancient Greek -τής (-tḗs) Ancient Greek -ῐστής (-ĭstḗs)bor. Latin -istader. Old French -istebor. Middle English -ist English -ist English theist English atheist From Middle French athéiste (athée + -iste), from Latin atheos, from Ancient Greek ἄθεος (átheos, “godless, without god”), from ἀ- (a-, “without”) + θεός (theós, “god”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.