/ Dictionary / Index P powerhouse: Meaning and Definition of Find definitions for: pow•er•house Pronunciation: (pou'ur-hous"), [key] — pl. -hous•es a generating station. a person, group, team, or the like, having great energy, strength, or potential for success. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: powerhouse (Thesaurus) powerful powerless Related Content Daily Word Quiz: miscreant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language