magnum opus

noun

mag·​num opus ˈmag-nəm-ˈō-pəs How to pronounce magnum opus (audio)
: a great work
especially : the greatest achievement of an artist or writer

Did you know?

You may recognize magnum (meaning "great") as a Latin word that shows up in altered forms in several English words, and perhaps you can also come up with a few words that are related to opus ("work"). Magnitude, magnanimous, opulent, and operate are some obvious relations of the two. Magnum opus, which entered English in the 18th century, retains the original Latin spelling and the literal meaning "great work." Although the term most often refers to literary, musical, or artistic productions, it has been used to describe many kinds of great works, including games, construction projects, and even surgical techniques.

Examples of magnum opus in a Sentence

His last novel was his magnum opus. this symphony is usually considered Beethoven's magnum opus
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The studio and the filmmaker are teaming up to adapt Stephen King’s magnum opus. Borys Kit, HollywoodReporter, 24 June 2025 Buckley would never finish his magnum opus of political philosophy, to be titled The Revolt Against the Masses, a reference to the Spanish philosopher José Ortega y Gasset’s classic Revolt of the Masses. Foreign Affairs, 24 June 2025 Advertisement Three movies into this saga, with two still to come, does Boyle ultimately care how people classify his horror magnum opus? Megan McCluskey, Time, 16 June 2025 It’s been almost a decade since Elon Musk stood in front of a crowd in Guadalajara, Mexico, and unveiled his magnum opus of a plan to take us all, or at least our species, to Mars. Eric MacK, Forbes.com, 27 May 2025 See All Example Sentences for magnum opus

Word History

Etymology

Latin

First Known Use

1791, in the meaning defined above

Time Traveler
The first known use of magnum opus was in 1791

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Cite this Entry

“Magnum opus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/magnum%20opus. Accessed 3 Jul. 2025.

Kids Definition

magnum opus

noun
mag·​num opus ˌmag-nə-ˈmō-pəs How to pronounce magnum opus (audio)
: a great work and especially the greatest achievement of an artist or writer
Last Updated: - Updated example sentences
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