Definitions for horsepowerˈhɔrsˌpaʊ ər

This page provides all possible meanings and translations of the word horsepower

Princeton's WordNet

  1. horsepower, HP, H.P.(noun)

    a unit of power equal to 746 watts


  1. horsepower(Noun)

    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. horsepower(Noun)

    A metric horsepower (symbol often PS from the German abbreviation), approximately equal to 735.5 watts.

  3. horsepower(Noun)


    political horsepower

  4. Origin: * From horse and power, the unit originally defined as the amount of power that a horse could provide.


  1. Horsepower

    Horsepower is the name of several units of measurement of power, the rate at which work is done. The most common conversion factor, especially for electrical power, is 1 hp = 746 watts. The term was adopted in the late 18th century by Scottish engineer James Watt to compare the output of steam engines with the power of draft horses. It was later expanded to include the output power of other types of piston engines, as well as turbines, electric motors and other machinery. The definition of the unit varied between geographical regions. Most countries now use the SI unit watt for measurement of power. With the implementation of the EU Directive 80/181/EEC on January 1, 2010, the use of horsepower in the EU is only permitted as supplementary unit.

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