Definition of red-eye noun from the Oxford Advanced Learner's Dictionary

     

    red-eye

     noun
    noun
    BrE
     
    ; NAmE
     
    Plane travel
     
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  1. 1(also red-eye flight) [countable] (informal, especially North American English) a flight in a plane at night, on which you cannot get enough sleep We took the red-eye to Boston. See related entries: Plane travel
  2. 2[uncountable] the appearance of having red eyes that people sometimes have in photographs taken using flash a flash mode that is designed to reduce the red-eye effect
See the Oxford Advanced American Dictionary entry: red-eye