/ Dictionary / Index O open market: Meaning and Definition of Find definitions for: o'pen mar'ket Pronunciation: [key] an unrestricted competitive market in which any buyer and seller is free to participate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. open-line open marriage Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language