/ Dictionary / Index M mailboat: Meaning and Definition of Find definitions for: mail•boat Pronunciation: (māl'bōt"), [key] — n. a boat for transporting mail. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mailboat (Thesaurus) mailbag mail bomb Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language