/ Dictionary / Index U undercoating: Meaning and Definition of Find definitions for: un•der•coat•ing Pronunciation: (un'dur-kō"ting), [key] — n. a protective seal applied to the underside of an automobile to reduce corrosion and vibration. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: undercoating (Thesaurus) undercoat undercompensate Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language