/ Dictionary / Index H Haymarket: Meaning and Definition of Find definitions for: Hay•mar•ket Pronunciation: (hā'mär"kit), [key] — n. a famous London market 1644–1830. a street in London, site of this market, known for its theaters. a playhouse erected in London in 1720 and still in use. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. haymaker Haymarket Square Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language