If you describe something or someone as incredible, you like them very much or are impressed by them, because they are extremely or unusually good. Incredible refers to something that is hard to believe because it seems extremely extraordinary, improbable, or astonishing. Hard to believe; Extremely good, great, or large [it + be + ~ + that clause] it is incredible that we won the championship. So extraordinary as to seem impossible: Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. The meaning of incredible is too extraordinary and improbable to be believed. [uncountable] in•cred•i•bly, adv. : Impossible, or very difficult, to believe: We got there with incredible speed. Find 533 different ways to say incredible, along with antonyms, related words, and example sentences at thesaurus. com. The books plot is incredible. Difficult or impossible to believe; It can also be used to describe something as exceptionally good or impressive. In•cred•i•bil•i•ty /ɪnˌkrɛdəˈbɪlɪti/ n. Impossible, or very…. Impossible or hard to believe: In•cred•i•ble /ɪnˈkrɛdəbəl/ adj. How to use incredible in a sentence. Definition of incredible adjective in oxford advanced learners dictionary. · from middle english incredible, from latin incrēdibilis (“that cannot be believed”), from in- (“not”) + crēdibilis (“worthy of belief”), from crēdō (“believe”), equivalent to in- + credible.