atheism

1. Belief that no deities exist (sometimes including rejection of other religious beliefs). (uncountable) · Near-synonyms: antireligiousness, irreligion, irreligiousness
2. A lack of belief in deities, or a belief that there is insufficient evidence to believe in a god. (uncountable) · Near-synonyms: irreligion, irreligiousness, nonreligion, nonreligiousness
3. Absence of belief that any deities exist (including absence of the concept of deities). (uncountable)
4. Neglect of one's obligations to God; behavior incongruent with belief in God (regardless of belief in the strict sense). (uncountable)
5. A rejection of all religions, even non-theistic ones. (uncountable)

Plural atheisms