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Definition of red–eye
1 : cheap whiskey
2 : the phenomenon of a subject's eyes appearing red in a color photograph taken with a flash
3 : a late night or overnight flight
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First Known Use of red–eye
1819
RED–EYE Defined for English Language Learners
red-eye
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noun
Definition of red–eye for English Language Learners
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: a flight in a passenger airplane that happens late at night or that continues through the night
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: the appearance of a person's eyes as red in a photograph that was taken with a flash
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