Definition of "pin down" [pin down]

• To attach or secure with pins (verb)
• To identify something (e.g. a decision or plan) clearly or specifically (verb)
• To hold the opponent back-first so both his or her shoulders touch the mat (verb)
• To corner somebody in order to get a firm answer (verb)

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• "Kissinger now sought to follow a demanding, made-in-Hanoi timetable: He would travel to that city on October 22 to pin down final details; the deal would be announced on the 26th and signed on the 30th."
• "The editors knew how difficult he was to pin down and thought that Kaplan might be able to help the photographer, Sian Kennedy, by being present for the shoot."
• "Trying to pin down Carter Paragon was like trying to nail smoke."