Entry 2 senses · 2 variants Webster, 1913 Atheize · A·the·ize · IPA v. t. v. i. 01 v. t. To render atheistic or godless. 1. To render atheistic or godless.[R.] “They endeavored to atheize one another.” — Berkeley. 02 v. i. To discourse, argue, or act as an atheist. 1. To discourse, argue, or act as an atheist.[R.]