godless

Someone who doesn't believe in any god is godless. Your religious grandmother might refer to your atheist uncle as godless.

While the adjective godless literally means just "not revering a god," it's most often used by religious people or groups to criticize those who don't show the proper respect to God or religion, or those who are unbelievers. When a group is described as a "godless society," it's usually an observation of a perceived lack of morality or law, coming from the idea that people who believe in God are better, more moral citizens.

Definitions of godless
1

adj not revering god

Synonyms:
irreverent
impious
lacking piety or reverence for a god

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