magnum opus

American  

noun

1. a great work, especially the chief work of a writer or artist.

   Proust's magnum opus is Remembrance of Things Past.

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magnum opus British  

noun

1. a great work of art or literature, esp the greatest single work of an artist

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magnum opus Cultural  

1. The most important work in a person's career, especially in literature, art, or scholarship: “Moby Dick was Melville's magnum opus.” From Latin, meaning “great work.”

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Etymology

Origin of magnum opus

Borrowed into English from Latin around 1785–95

Example Sentences

Yet long before earning all these accolades, Shakira was a teen girl in Baranquilla, Colombia, waiting in line at her local record store for a copy of Nirvana’s 1991 grunge magnum opus, “Nevermind.”

From Los Angeles Times • Mar. 18, 2026

The following year Skepta released his own magnum opus, Konnichiwa.

From BBC • Oct. 31, 2025

We made a new calendar for 2025 and have plans for what could be our magnum opus: a coffee-table book.

From Slate • Feb. 4, 2025

Surely, they could draw from the contents of that magnum opus during their January 1969 Twickenham rehearsals?

From Salon • May 7, 2024

“I don’t know what a magnum opus is,” said Wilbur.

From "Charlotte's Web" by E.B. White