/ Dictionary / Index M markup: Meaning and Definition of Find definitions for: mark•up Pronunciation: (märk'up"), [key] — n. the amount added by a seller to the cost of a commodity to cover expenses and profit in fixing the selling price. the difference between the cost price and the selling price, computed as a percentage of either the selling price or the cost price. an increase in price, as of a commodity. the amount by which a price is increased. the putting of a legislative bill into final form. a detailed instruction, usually written on a manuscript to be typeset, concerning style of type, makeup of pages, and the like. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: markup (Thesaurus) markswoman marl Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language