Part of speech: Adjective, Noun
Definition:
Pronunciations:
Origin and Usage:
The adjective "upper" originated in Middle English, from Old English "uppere", meaning higher in position. It has been in use since the 14th century. The noun "upper" originated in the 1960s as slang for amphetamine, a stimulant drug. It is commonly used in the United States and is considered informal.
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