/ Dictionary / Index P preamp: Meaning and Definition of Find definitions for: pre•amp Pronunciation: (prē'amp"), [key] — n. Informal. a preamplifier. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. preamble preamplifier Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language