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English definition of “upper”

upper

adjective [not gradable]  /ˈʌp·ər/ us  
at a higher position or level (than something else), or being the top part of something: Our company occupied the three upper floors of the building.

upper

noun [C]  /ˈʌp·ər/ us  
the top part of a shoe
(Definition of upper from the Cambridge Academic Content Dictionary © Cambridge University Press)
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