ray - definition in the American English Dictionary - Cambridge Dictionaries Online (US)

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English definition of “ray”

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ray

noun [C]  us   /reɪ/

ray noun [C] (BEAM)

physics a narrow beam of light, heat, or energy

ray noun [C] (LINE)

geometry half of a line

ray noun [C] (AMOUNT)

a slight amount or signal of something good: One couple seems interested in buying our house, which is a ray of hope after all these months.
(Definition of ray from the Cambridge Academic Content Dictionary © Cambridge University Press)
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