1. horsepower; hp
2. energy; vitality; vigour
Wikipedia definition
3. HorsepowerHorsepower (hp) is the name of several units of measurement of power. The most common definitions equal between 735.5 and 750 watts. Horsepower was originally defined to compare the output of steam engines with the power of draft horses in continuous operation. The unit was widely adopted to measure the output of piston engines, turbines, electric motors, and other machinery. The definition of the unit varied between geographical regions.
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