Phrasal Verbs
- 1(informal) to know about what someone has done wrong She knew the police would be onto them.
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- 2to be talking to someone, 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.