upper Definition in Cambridge British English Dictionary
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Definition of "upper" - British English Dictionary

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upperadjective [before noun]

uk   /ˈʌp.ər/  us   //
B1 at a higher position or level than something else, or being the top part of something: The office block's upper floors were being repainted. If the infection is not checked it will probably spread to the upper body.
Opposite
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uppernoun [C]

uk   /ˈʌp.ər/  us   //

upper noun [C] (SHOE PART)

the top part of a shoe that covers a person's foot and to which the heel and the sole are fixed: These shoes have leather uppers and synthetic soles.

upper noun [C] (DRUG)

informal a drug that causes a person taking it to feel very active and excited
Opposite
(Definition of upper from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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