Entry 2 senses · 2 variants Webster, 1913 Interminate · In·ter·mi·nate · IPA /ɪnˈtɜː(ɹ)mɪnət/ a. v. t. 01 a. Endless; as, interminate sleep. 1. Endless; as, interminate sleep. 02 v. t. To menace; to threaten. 1. To menace; to threaten.[Obs.]