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

opus

noun
 
/ˈəʊpəs/
 
/ˈəʊpəs/
(plural opera
 
/ˈɒpərə/
 
/ˈɑːpərə/
)
[usually singular]
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  1. (abbreviation op.)
    a piece of music written by a famous composer and usually followed by a number that shows when it was written
    • Beethoven’s Opus 18
    Topics Musicc2
  2. (formal) an important piece of literature, etc., especially one that is on a large scale synonym work see also magnum opus
  3. Word Originearly 18th cent.: from Latin, literally ‘work’.
See opus in the Oxford Advanced American Dictionary

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alloy
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From the Topic
Physics and chemistry
C2
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