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

be onto

phrasal verb
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be onto somebody
  1. (informal) to know about what somebody has done wrong
    • She knew the police would be onto them.
  2. to be talking to somebody, usually in order to ask or tell them something
    • They've been onto me for ages to get a job.
be onto something
  1. 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 be onto in the Oxford Advanced American Dictionary

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trait
noun
 
 
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