/ Dictionary / Index W word of mouth: Meaning and Definition of Find definitions for: word' of mouth' Pronunciation: [key] informal oral communication: The rumor spread rapidly by word of mouth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. word of honor word order Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language