/ Dictionary / Index P power amplifier: Meaning and Definition of Find definitions for: pow'er am"plifier Pronunciation: [key] — Elect. Elect. an amplifier for increasing the power of a signal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. power power assist Related Content Daily Word Quiz: exemplary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language