Adjective word of mouth has 1 sense
  1. viva-voce, word-of-mouth - expressed orally; "a viva-voce report"; "the film had good word-of-mouth publicity"
    Antonym: written (indirect, via spoken)
,Noun word of mouth has 1 sense
  1. grapevine, pipeline, word of mouth - gossip spread by spoken communication; "the news of their affair was spread by word of mouth"
    --1 is a kind of gossip, comment, scuttlebutt
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