/ Dictionary / Index D direct mail: Meaning and Definition of Find definitions for: direct' mail' Pronunciation: [key] mail, usually consisting of advertising matter, appeals for donations, or the like, sent simultaneously to large numbers of possible individual customers or contributors. Abbr.: DM Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. directly direct-mailer Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language