Impossible to dispute; unquestionable: incontrovertible proof of the defendant's innocence. in·con′tro·vert′i·bil′i·ty , in·con′tro·vert′i·ble·ness n. Incontrovertible evidence definition: Evidence is anything that you see , experience , read , or are told that causes you to | Meaning, pronunciation, translations and examples in American English.