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Definition of magnum opus noun from the Oxford Advanced Learner's Dictionary

magnum opus

noun
 
/ˌmæɡnəm ˈəʊpəs/
 
/ˌmæɡnəm ˈəʊpəs/
 [singular] (from Latin)
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  1. a large and important work of art, literature or music, especially one that people think is the best work ever produced by that artist, writer, etc.
    • The author produced his magnum opus just before he died.
    Topics Literature and writingc2, Artc2
    Word Originlate 18th cent.: from Latin, ‘great work’.
See magnum opus in the Oxford Advanced American Dictionary
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noun
 
 
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