horse ‧ pow ‧ er /ˈhɔːsˌpaʊə $ ˈhɔːrsˌpaʊr/ BrE AmE noun ( plural horsepower ) [uncountable and countable] ( written abbreviation hp )
a unit for measuring the power of an engine, or the power of an engine measured like this:
a two-hundred horsepower engine
the superior horsepower of a Volkswagen