/ Dictionary / Index M Mass card: Meaning and Definition of Find definitions for: Mass' card" Pronunciation: [key] a card stating that a Mass will be said, esp. for a deceased person, and sent by the donor, as to the family of the deceased. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Mass book masscult Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language