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\ ˈred-ˌī 
\
\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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More Definitions for red-eye
red-eye
nounEnglish Language Learners Definition of red-eye
US, informal : a flight in a passenger airplane that happens late at night or that continues through the night
: the appearance of a person's eyes as red in a photograph that was taken with a flash
See the full definition for red-eye in the English Language Learners Dictionary
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Time Traveler for red-eye
The first known use of red-eye was in 1819
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