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English definition of “horse power”

horse power

noun [C or U] (plural horse power) (also horsepower)     (abbreviation hp) MEASURES
a unit used for measuring the power of an engine: Horse power rates the engine performance of cars and even lawn mowers. With a 520 horsepower, V12 engine, this is the fastest car the company has ever made.
(Definition of horse power noun from the Cambridge Business English Dictionary © Cambridge University Press)
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