Entry 1 sense Webster, 1913 Unmistakable /ŭnˌ-mĭs-tāk'-əb-əl/ · Un·mis·tak·a·ble · IPA /ˌʌnmɪstˈeɪkəbəl/ 01 a. Incapable of being mistaken or misunderstood; clear; plain; obvious; evident. 1. Incapable of being mistaken or misunderstood; clear; plain; obvious; evident.