D defs.my
Entry 2 senses Webster, 1913

Atheistic

/āthˌ-ē-ĭs'-tĭk/ · A·the·is·tic · IPA /ˌeɪθiːˈɪstɪk/
01 a. Pertaining to, implying, or containing, atheism; -- applied to things; as, atheistic doctrines, opinions, or books.
  1. 1.
    Pertaining to, implying, or containing, atheism; -- applied to things; as, atheistic doctrines, opinions, or books.
    Atheistical explications of natural effects.” Barrow.
  2. 2.
    Disbelieving the existence of a God; impious; godless; -- applied to persons; as, an atheistic writer.