/ Dictionary / Index A ampliation: Meaning and Definition of Find definitions for: am•pli•a•tion Pronunciation: (am"plē-ā'shun), [key] — n. Archaic. an enlarging or extending; amplification. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ampliate amplidyne Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language