Definition of be onto phrasal verb from the Oxford Advanced Learner's Dictionary


be onto

 phrasal verb
phrasal verb
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Phrasal Verbs
  1. 1(informal) to know about what somebody has done wrong She knew the police would be onto them.
  2. 2to be talking to somebody, usually in order to ask or tell them something They've been onto me for ages to get a job.
to know about something or be in a situation that could lead to a good result for you Scientists believe they are onto something big. She's onto a good thing with that new job.
See the Oxford Advanced American Dictionary entry: be onto

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