to get some information about sth/sb by asking, reading, etc
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She'd been seeing the boy for a while, but didn't want her parents to find out.
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I haven't found anything out about him yet.
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\find out (about somebody) what, when, etc…Can you find out what time the meeting starts?
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\find out (about somebody) that…We found out later that we had been at the same school.
Useful english dictionary. 2012.