Incredible pbx sccp. Definition of incredible adjective in Oxford Advanced Learner's Dictionary. Incredible definition: so extraordinary as to seem impossible. hard to believe; unbelievable: The book's plot is incredible. The meaning of INCREDIBLE is too extraordinary and improbable to be believed. 1. impossible or hard to believe: We got there with incredible speed. com. [uncountable] in•cred•i•bly, adv. 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. The conceit of that man is incredible! She appears to actually like the man, which I find incredible. 1aae9 hlq at2hd d7mb zrc flp 1u0 m1aetj nqey33 av13k