Definition of upper noun from the Oxford Advanced Learner's Dictionary

     

    upper

     noun
    noun
    BrE BrE//ˈʌpə(r)//
     
    ; NAmE NAmE//ˈʌpər//
     
    [usually plural]
     
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  1. 1the top part of a shoe that is attached to the sole shoes with leather uppers
  2. 2 (informal) a drug that makes you feel excited and full of energy compare downer
  3. Word Originnoun sense 1 Middle English: from the adjective up + -er. noun sense 2 1960s: from the verb up + -er.Idioms (British English, informal) having very little money See related entries: Poverty and famine
See the Oxford Advanced American Dictionary entry: upper