Definition of atheism
1a : a lack of belief or a strong disbelief in the existence of a god or any godsb : a philosophical or religious position characterized by disbelief in the existence of a god or any gods
2 archaic : godlessness especially in conduct : ungodliness, wickedness
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Origin and Etymology of atheism
Middle French athéisme, from athée atheist, from Greek atheos godless, from a- + theos god
First Known Use: 1546
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