/ Dictionary / Index H hp: Meaning and Definition of Find definitions for: hp Pronunciation: [key] horsepower. H.P. Pronunciation: [key] high power. high pressure. horsepower. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hp (Thesaurus) Hoyt HPV Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language