Interminate \In*ter"mi*nate\, a. [L. interminatus; in- not + terminatus, p. p. of terminate.] Endless; as, interminate sleep. --Chapman. Interminate \In*ter"mi*nate\, v. t. [L. interminatus, p. p. of interminari; inter between + minari to threaten.] To menace; to threaten. [Obs.] --Bp. Hall.