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| zero in |
intransitive verb |
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| Definition: |
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1. identify something and concentrate on it: to identify something precisely and concentrate all efforts on dealing with it
 The report zeroed in on the weaknesses in the current policy.
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2. locate target and aim at it: to find the precise position of a target and move toward it or aim a weapon at it, threateningly or inexorably
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| [< the technique of setting a gun sight exactly on a target by canceling out the effects of elevation and wind deflection] |
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