hp

noun

1. 1

   Power derived from the motion of a horse.

2. 2

   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.

3. 3

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

4. 4

   Strength.

   “political horsepower”