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English definition of “onto”

onto

preposition    /ˈɔn·tə, ˈɑn-, -tu/
into a position on: Gennaro tossed his newspaper onto the table . be onto To be onto something or someone is to be aware of other information relating to the situation , esp . when someone is trying to deceive you: Everybody is onto you – why don’t you admit you lied ?
(Definition of onto preposition from the Cambridge Academic Content Dictionary © Cambridge University Press)
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