/ Dictionary / Index A amplifier: Meaning and Definition of Find definitions for: am•pli•fi•er Pronunciation: (am'plu-fī"ur), [key] — n. a person or thing that amplifies or enlarges. an electronic component or circuit for amplifying power, current, or voltage. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: amplifier (Thesaurus) amplificatory amplify Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language