01 a. Pertaining to, implying, or containing, atheism; -- applied to things; as, atheistic doctrines, opinions, or books.
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1.
Pertaining to, implying, or containing, atheism; -- applied to things; as, atheistic doctrines, opinions, or books.“Atheistical explications of natural effects.” — Barrow.
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2.
Disbelieving the existence of a God; impious; godless; -- applied to persons; as, an atheistic writer.