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Definition of nova noun from the Oxford Advanced American Dictionary

 

nova

 noun
noun
NAmE//ˈnoʊvə//
 
(pl. novae
NAmE//ˈnoʊvi//
 
or novas)
(astronomy)
 
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a star that suddenly becomes much brighter for a short period compare supernova
See the Oxford Advanced Learner's Dictionary entry: nova

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