American English

Definition of caution verb from the Oxford Advanced American Dictionary



[intransitive, transitive]Verb Forms present simple I / you / we / they caution
he / she / it cautions
past simple cautioned
-ing form cautioning
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to warn someone about the possible dangers or problems of something caution against something I would caution against getting too involved. caution somebody against/about something Sam cautioned him against making a hasty decision. caution (somebody) that… The government cautioned that pay increases could lead to job losses. caution somebody to do something Employees were cautioned to be careful about what they said to people outside the company. caution (somebody) + speech “I'd be careful if I were you,” she cautioned (him).
See the Oxford Advanced Learner's Dictionary entry: caution