Entry 1 sense Webster, 1913 Perpetual /pẽrp-ĕch'-o͞o-əl/ · Per·pet·u·al · IPA /pɚˈpɛt͡ʃuəl/ 01 a. Neverceasing; continuing forever or for an unlimited time; unfailing; everlasting; continuous. 1. Neverceasing; continuing forever or for an unlimited time; unfailing; everlasting; continuous. “Unto the kingdom of perpetual night.” — Shak. “Perpetual feast of nectared sweets.” — Milton. Phrases & compounds Circle of perpetual apparition — See under Circle. Perpetual calendar — a calendar so devised that it may be adjusted for any month or year. Perpetual curacy — a curacy in which all the tithes are appropriated, and no vicarage is endowed. Perpetual motion — See under Motion. Perpetual screw — See Endless screw, under Screw. Syn. Continual; unceasing; endless; everlasting; incessant; constant; eternal. See Constant.