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

When Anni Albers published her theoretical magnum opus “On Weaving” in 1965, she was already lamenting the loss of our tactile sensibilities, which have undeniably worsened in the digital era.

From Los Angeles Times • Sep. 15, 2025

Consumers’ Research, the Supreme Court reversed an opinion that Oldham presented as something of a magnum opus.

From Slate • Jul. 10, 2025

In a landmark event for film lovers, the fully restored, uncut version of Ramesh Sippy's 1975 magnum opus will have its world premiere at Il Cinema Ritrovato Festival in Bologna, Italy, on Friday.

From BBC • Jun. 25, 2025

In 1966, Wilson led The Beach Boys in the production of "Pet Sounds," the magnum opus that elevated the group’s stature for all time.

From Salon • Jun. 12, 2025

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

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