/ Dictionary / Index D direct-mailer: Meaning and Definition of Find definitions for: di•rect-mail•er Pronunciation: (di-rekt'mā'lur, dī-), [key] — n. a person or firm engaged in direct-mail advertising. a letter, advertisement, or other item sent out in direct mail. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: direct-mailer (Thesaurus) direct mail direct marketing Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language