Entry 1 sense Webster, 1913 Irrefutable /ĭrˌ-əf-yo͞ot'-əb-əl/ · Ir·re·fut·a·ble · IPA /ˌɪɹɪˈfjuːtəbəl/ 01 a. Incapable of being refuted or disproved; indisputable. 1. Incapable of being refuted or disproved; indisputable.