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moon

 
 
/muːn/ noun

Definition

the moon the round object that shines in the sky at night and moves around the Earth
crescent/full/new moon the shape made by the amount of the moon that you can see at a particular time
[C] a round object like the moon that moves around another planet: The planet Saturn has eighteen moons.
(Definition of moon noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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