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Definition from macmillandictionary.com

ray

 
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noun [countable] British English pronunciation: ray /reɪ/ 
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singularray
pluralrays
  1. 1
    [usually plural] an amount of light or heat from the sun

    The last rays of the sun were disappearing behind the mountains.

    Your skin needs protection from the sun's rays.

    1. a.
      a narrow line of light that you can see coming from the sun or a lamp

      He stood on the stage, illuminated by a dazzling ray of light.

    2. b.
      a line of energy in the form of heat or light

      Their instruments were able to detect faint rays of radiation.

      Sunglasses can filter out harmful ultraviolet rays.

phrases

This is the British English definition of ray. View American English definition of ray