eagle eye

American  

noun

1. unusually sharp visual powers; keen ability to watch or observe.

2. a person who has sharp vision or who maintains a keen watchfulness.

3. alert watchfulness.

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eagle eye Idioms  

1. Unusually keen sight; also, keen intellectual vision. For example, Antiques dealers have an eagle eye for valuable objects, or A good manager has an eagle eye for employee errors. [Late 1500s]

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Etymology

Origin of eagle eye

First recorded in 1595–1605