Définitions
1.NounA non-belief in deities.
2.NounBelief that no deities exist (sometimes including rejection of other religious beliefs).
3.NounA lack of belief in deities, or a belief that there is insufficient evidence to believe in a god.
4.NounAbsence of belief that any deities exist (including absence of the concept of deities).
5.NounAbsence of belief in a particular deity, pantheon, or religious doctrine (notwithstanding belief in other deities).
6.NounA rejection of all religions, even non-theistic ones.