/ Dictionary / Index M mailroom: Meaning and Definition of Find definitions for: mail•room Pronunciation: (māl'rm", -room"), [key] — n. a room used for handling incoming and outgoing mail, as in a large organization. —adj. of or pertaining to a mailroom: mailroom employees. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mail-out maim Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language