ˈāthēˌizəm noun
( -s )
Etymology: Middle French athéisme, from athée atheist (from Greek atheos godless, not believing in the existence of gods, from a- a- (II) + theos god) + -isme -ism — more at the-
1.
a. : disbelief in the existence of God or any other deity
b. : the doctrine that there is neither God nor any other deity — compare agnosticism
2. : godlessness especially in conduct : ungodliness , wickedness