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English definition of “sun”

sun

noun [U]  /sʌn/ us  
the star around which the earth moves and that provides light and heat for the earth: The sun is the center of our solar system. Sun also means the light or heat that the earth receives from this star: Sit in the sun where it’s a lot warmer.

sun

verb [I/T]  /sʌn/ (-nn-) us  
to lie or sit somewhere where there is a lot of sun, esp. in order to make your skin darker: [T] All morning, the cat sunned herself on the stone wall.
(Definition of sun noun, verb from the Cambridge Academic Content Dictionary © Cambridge University Press)
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