/ Dictionary / Index M Martha's Vineyard: Meaning and Definition of Find definitions for: Mar'tha's Vine'yard Pronunciation: [key] an island off SE Massachusetts: summer resort. 6000; 108 sq. mi. (282 sq. km). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Martha Martha Washington chair Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language