ATHEIST'IC, ATHEIST'ICAL, adjective 1. Pertaining to atheism. 2. Disbelieving the existence of a God; impious, applied to persons; as, an atheistic writer. 3. Implying or containing atheism; applied to things, as, atheistic doctrines or opinions.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI