atheist
A person who does not believe in deities or gods.
Other meanings
A person who is certain that no deities exist or who thinks that the existence of deities can be disproven.
A person who doubts the existence of deities (therefore, an agnostic may be considered an atheist).
Example sentences
Word history
From Ancient Greek "ἄθεος" (godless, without god).
Where this comes from
This definition is adapted from “atheist” on Wiktionary, by its contributors; example sentences are from Tatoeba, credited to their authors above, published under CC BY-SA 4.0. This page is published under the same licence.