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English Lexicon

Magnum opus

/ˈmæɡ.nəm ˈoʊ.pəs/
nounCEFR C1 (Advanced)Top #14500 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    The most important, brilliant, or greatest work of an artist, writer, composer, or thinker.

    "The sprawling historical novel was widely considered to be the author's magnum opus."
  2. 2

    A vast and masterly piece of creative or scientific undertaking.

    "Building the complex architectural cathedral was the master mason's lifelong magnum opus."
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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Borrowed directly from Latin, where 'magnum' means great and 'opus' means work. Entering English usage via artistic and literary discourse during the 18th century, the term originally denoted the ultimate achievement in alchemical transmutation before expanding to signify the greatest artistic, literary, or scholarly creation of a person's career.

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