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| nail down |
verb |
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| Definition: |
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1. transitive verb pin something down: to make somebody be definite about something
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2. transitive verb settle something finally: to settle something finally or come to a final decision about something
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3. establish something definitively: to establish something clearly and conclusively
 an investigation that will attempt to nail down what really happened here
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4. beat somebody conclusively: to defeat an opponent decisively
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