/ Dictionary / Index M Massachusetts Bay Company: Meaning and Definition of Find definitions for: Mas'sachu'setts Bay' Com"pany Pronunciation: [key] a company, chartered in England in 1629 to establish a colony on Massachusetts Bay, that founded Boston in 1630. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Massachusetts Bay massacre Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language