word of mouth[-əv mo̵ut̸h′]
word of mouth definition by Webster's New World
informal speech or conversation between persons, as opposed to writing or publishing: gossip spread by word of mouth
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
communicated orally, as in conversation
word of mouth definition by American Heritage Dictionary
Spoken communication: News of their success spread by word of mouth.
- wordˈ-of-mouthˈ adjective