Entry 1 sense Webster, 1913 Incontrovertible /ĭngˌ-känˌ-trōv-ẽrt'-ĭb-əl/ · In·con·tro·ver·ti·ble · IPA /ˌɪŋ.kɒn.tɹəˈvɜː.təbl̩/ 01 a. Not controvertible; too clear or certain to admit of dispute; indisputable. 1. Not controvertible; too clear or certain to admit of dispute; indisputable.