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| pin down |
transitive verb |
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| Definition: |
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1. identify something precisely: to determine something with certainty
 Can you pin down the time of death?
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2. force somebody to decide: to force somebody to keep a commitment or come to a decision
 I haven't managed to pin him down to a date for our meeting yet.
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3. prevent somebody from moving: to prevent somebody from going anywhere
 The platoon was pinned down by enemy fire.
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