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English definition of “pin sth down”

pin sth down

phrasal verb with pin
 
 
/pɪn/ verb [T] (present participle pinning, past tense and past participle pinned)
to discover exact details about something: Investigators are trying to pin down the cause of the fire.Accurate and exact
(Definition of pin sth down from the Cambridge Learners Dictionary © Cambridge University Press)
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