direct mail(n = noun.communication) - advertising sent directly to prospective customers via the mail;
is a kind of ad, advert, advertisement, advertising, advertizement, advertizing

1st-class mail, air mail, bulk mail, chain mail, coat of mail, dead mail, direct, direct action, direct antonym, direct contrast, direct correlation, direct current, direct discourse, direct dye, direct evidence, direct examination, direct fire, direct flight, direct line, direct loan, direct mailer, direct marketing, direct object, direct primary, direct quotation, direct sum, direct support, direct supporting fire, direct tax, direct tide, direct transmission, direct trust, electronic mail, express mail, fan mail, first-class mail, foreign direct investment, hate mail, joint direct attack munition, junk mail, mail, mail bag, mail boat, mail call, mail car, mail carrier, mail clerk, mail coach, mail fraud, mail order, mail order house, mail out, mail pouch, mail service, mail slot, mail train, registered mail, ring mail, snail mail, stage direct, surface mail, third-class mail, voice mail