[hawrs-pou-er-ouuh r, -ou-er]
- a foot-pound-second unit of energy or work, equal to the work done by a mechanism with a power output of one horsepower over a period of one hour.
Origin of horsepower-hour
First recorded in 1895–1900
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- an fps unit of work or energy equal to the work done by 1 horsepower in 1 hour. 1 horsepower-hour is equivalent to 2.686 × 10 6 joules