/ Dictionary / Index M mechanical impedance: Meaning and Definition of Find definitions for: mechan'ical imped'ance Pronunciation: [key] impedance (def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mechanical equivalent of heat mechanical metallurgy Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language