Definition of caution verb from the Oxford Advanced American Dictionary

 

caution

 verb
verb
NAmE//ˈkɔʃn//
 
[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