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Definition of supermoon noun from the Oxford Advanced Learner's Dictionary

supermoon

noun
 
/ˈsuːpəmuːn/
 
/ˈsuːpərmuːn/
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  1. an occasion on which the moon appears particularly large in the sky because it is at its closest point to the earth
    • The second supermoon of the summer lit up the night sky on 10th August.
previously
adverb
 
 
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