magnum opusmagnum opus
- a great work, esp. of art or literature; masterpiece
- a person's greatest work or undertaking
Origin of magnum opusClassical Latin
- A great work, especially a literary or artistic masterpiece.
- The greatest single work of an artist, writer, or composer.
Origin of magnum opusLatin magnum neuter of magnus great opus work
(plural magna opera or magnum opuses or magnum opi)
Examples of magna opera: Don Quixote by Miguel de Cervantes; In Search of Lost Time by Marcel Proust and Mona Lisa by Leonardo Da Vinci.
The Latin plural magna opera may be preferred in some academic and literary contexts, in popular usage the English-style plural magnum opuses is more common. The plural magnum opi, although rare and likely regarded as incorrect in formal works, does see some use.
From Latin magnum opus (“great work").