ENGLISH
REFERENCE

atheist

n. · adj.
US //ˈeɪθiəst// UK //ˈeɪθɪˌɪst// athe·ist
  1. 1 person without belief in gods (n.)
    B2 Upper Intermediate Religion

    someone who does not believe in any gods.

    a person who disbelieves or lacks belief in the existence of God or gods.

    Example

    He described himself as an atheist because he didn't find any evidence for a creator.

    Example

    The philosopher argued that being an atheist does not preclude a person from having a strong sense of morality or wonder at the universe.

    • nonbeliever
    • unbeliever
  2. 2 relating to atheism (adj.)
    C1 Advanced Formal Religion

    describing something that relates to the belief that there are no gods.

    relating to or characteristic of atheists or atheism.

    Example

    The author wrote several atheist books about science and logic.

    Example

    The movement gained momentum through various atheist manifestos that challenged the traditional role of the church in public life.

    • atheistic
    • non religious
Origin

From Middle French athéiste (athée + -iste), from Latin atheos, from Ancient Greek ἄθεος (átheos, “godless, without god”), from ἀ- (a-, “without”) + θεός (theós, “god”).

© 2026 English Reference