/ Dictionary / Index M mailing machine: Meaning and Definition of Find definitions for: mail'ing machine" Pronunciation: [key] a machine that prepares mail for sending, as by addressing, stamping, weighing, etc. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mailing list mailing tube 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