/ Dictionary / Index D dead matter: Meaning and Definition of Find definitions for: dead' mat"ter Pronunciation: [key] — Print. Print. type that has been set and used for printing or platemaking and is of no further use. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dead march dead-melt Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language