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English definition of “sight”

sight

noun [U] (SEEING)   /sɑɪt/
the ability to see, or the act of seeing something: Machines don’t have a sense of sight. The sight of sick children disturbs her. I know David by sight (= I know what he looks like). Officers arrested the looters on sight (= as soon as they saw them).
(Definition of sight noun (SEEING) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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