/ Dictionary / Index P parametric amplifier: Meaning and Definition of Find definitions for: par'amet'ric am'plifier Pronunciation: [key] — Electronics. Electronics. a device, as an electron tube or transistor, that amplifies a high-frequency input signal by sinusoidally varying the reactance of the circuit. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. parameterize parametric equation 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