hangover Syllabification: (hang·o·ver)Pronunciation: /ˈhaNGˌōvər/Translate hangover | into French | into German | into Italian | into Spanish Definition of hangover noun a severe headache or other after effects caused by drinking an excess of alcohol. a thing that has survived from the past:a hangover from the sixtieshangover in other Oxford dictionaries Definition of hangover in the British & World English dictionary