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English definition of “by word of mouth”

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by word of mouth

in speech but not in writing: All the orders were given by word of mouth so that no written evidence could be discovered later.
Translations of “by word of mouth”
in Chinese (Traditional) 口頭上的…
in Chinese (Simplified) 口头上的…
(Definition of by word of mouth from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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