- the power exerted by a horse in pulling
- pl. -·pow·er a basic unit of power in the FPS system, equal to the power needed to raise a weight of 550 pounds a distance of 1 foot in 1 second or a weight of 33,000 pounds a distance of 1 foot in 1 minute (746 watts or 42.41 British thermal units per minute): used esp. for measuring the power of motors or engines: abbrev. hp
- Informal effective power: my computer doesn't have enough horsepower to crunch those numbers
Origin of horsepower
first adopted by James Watt