/ Dictionary / Index T topcoat: Meaning and Definition of Find definitions for: top•coat Pronunciation: (top'kōt"), [key] — n. a lightweight overcoat. the coat of paint applied last to a surface. —v.t. to apply the topcoat to (a surface). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: topcoat (Thesaurus) topcastle top dog Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language