Definition of straight noun from the Oxford Advanced American Dictionary

     

    straight

     noun
    noun
    NAmE//streɪt//
     
     
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    sex
  1. 1(informal) a person who has sexual relationships with people of the opposite sex, rather than the same sex gays and straights
  2. of road/track
  3. 2 (also straightaway) a straight part of a racetrack or road
See the Oxford Advanced Learner's Dictionary entry: straight