In a way that is very surprising or difficult to believe: Unbeknownst unbelief unbelievable unbelievably unbeliever unbelieving unbelligerent Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
Definition of unbelievably adverb in oxford advanced learner's dictionary. In a way that is very surprising…. In a manner that is hard to believe;
He's worked unbelievably hard and he has very carefully earned people's respect. See examples of unbelievably used in a sentence. `unbelievably, we have now made it to the final twice.'