Entry 1 sense Webster, 1913 Temperamental /tĕmˌ-prəm-ĕn'-təl/ · Tem·per·a·men·tal · IPA /ˌtɛmp(ə)ɹəˈmɛntl̩/ 01 a. Of or pertaining to temperament; constitutional. 1. Of or pertaining to temperament; constitutional.[R.]