/ Dictionary / Index P power supply: Meaning and Definition of Find definitions for: pow'er supply" Pronunciation: [key] a device that provides power to electric machines, generators, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. power structure power takeoff Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language