/ Dictionary / Index M Massachusetts Bay: Meaning and Definition of Find definitions for: Mas'sachu'setts Bay' Pronunciation: [key] an inlet of the Atlantic, off the E coast of Massachusetts. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Massachusetts ballot Massachusetts Bay Company Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language