definitely Syllabification: (def·i·nite·ly)Pronunciation: /ˈdefənitlē/Translate definitely | into French | into German | into Italian | into Spanish Definition of definitely adverb without doubt (used for emphasis):I will definitely be at the airport to meet you in a definite manner; clearly:we couldn’t plan to go elsewhere until we had heard from you more definitelydefinitely in other Oxford dictionaries Definition of definitely in the British & World English dictionary