Bedeutung von “pin sth down” — Learner’s Dictionary

pin sth down

phrasal verb with pin us uk /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.

(Definition von “pin sth down” aus dem Cambridge Learner's Dictionary © Cambridge University Press)