Definition of ray noun from the Oxford Advanced American Dictionary

     

    ray

     noun
    noun
    NAmE//reɪ//
     
     
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  1. 1a narrow line of light, heat, or other energy the sun's rays ultraviolet rays The windows were shining in the reflected rays of the setting sun. see also cosmic rays, X-ray
  2. 2ray of something a small amount of something good, or of something that you are hoping for synonym glimmer There was just one small ray of hope.
  3. 3a sea fish with a large, broad, flat body and a long tail, that is used for food
  4. Idioms
    catch/get/grab some rays(informal)
     
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    to sit or lie in the sun, especially in order to get a suntan
    a ray of sunshine(informal)
     
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    a person or thing that makes life brighter or more cheerful
See the Oxford Advanced Learner's Dictionary entry: ray