Horsepower

Noun

 * 1) A non-metric unit of power (symbol hp) with various definitions, for different applications. The most common of them is probably the mechanical horsepower, approximately equal to 745.7 watts.
 * 2) A metric horsepower (symbol often PS from the German abbreviation), approximately equal to 735.5 watts.
 * 3) Strength
 * political horsepower

Derived terms

 * horsepower-hour
 * hydraulic horsepower
 * mechanical horsepower
 * thermal horsepower