Definition of hangover noun from the Oxford Advanced American Dictionary

     

    hangover

     noun
    noun
    NAmE//ˈhæŋˌoʊvər//
     
     
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  1. 1the headache and sick feeling that you have the day after drinking too much alcohol She woke up with a terrible hangover.
  2. 2[usually singular] hangover (from something) a feeling, custom, idea, etc. that remains from the past, although it is no longer practical or suitable the insecure feeling that was a hangover from her childhood hangover laws from the previous administration see also holdover
See the Oxford Advanced Learner's Dictionary entry: hangover