The power or rate of work of a horse in drawing; (hence in Mechanics) a conventional unit for measuring the rate of work of a prime motor…

(a) a unit of energy equal to the energy required to raise a weight of one pound by a height of one foot (now chiefly U.S.); (b) a unit of torque…

a unit of energy, defined as the amount of energy necessary to raise a ton of mass a foot in height.

The quantity of energy required to raise a weight of one kilogram to the height of one metre.

A unit of work or energy; the amount of work done when a force of one dyne moves its point of application one centimetre in the direction of the…

A measure of work in the centimetre-gramme-second system, equal to a thousand ergs.

With qualifying words, esp. brake horsepower n. the power available at the shaft of an engine, measurable by means of a brake; indicated horsepower n.…

the amount of energy required to raise a ton through a height of one metre.

An electrical unit, being the amount of work done (or of heat generated) by a current of one ampère acting for one second against a resistance of…

the work done by one watt in one hour.

Human energy; the power or agency of a person expending energy. Formerly also: a unit or rate of power, variously reckoned as between an eighth and a…

a unit representing the work performed or energy consumed in working at the rate of one horsepower for one hour.

Colloquial abbreviation of horsepower, n.