noun
magnum opus
MAG-num OH-pus
Magnum opus (noun) means the greatest and most important work produced by an artist, writer or composer, usually the one they are remembered for. Example: “The novel is widely regarded as her magnum opus.”
noun
1
The greatest and most important work produced by an artist, writer or composer, usually the one they are remembered for.
"The novel is widely regarded as her magnum opus."
"He spent eleven years on what he insisted would be his magnum opus."
2
Any large and demanding undertaking that represents someone's finest effort.
"The restoration of the town hall became the architect's magnum opus."
How to use magnum opus
Learner’s notesIn plain EnglishThe best and most important thing someone ever made.
When to use it
Formal and slightly literary; usually italicised in older style guides but now commonly set in roman.
Memory tip
"Oeuvre" means an artist's entire body of work; the magnum opus is the single peak within it.
Trace the full origin ↓
Easily confused with
Common pairings
his magnum opus
widely considered her magnum opus
unfinished magnum opus
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The novel is widely regarded as her _____.
Etymology
From Latin magnum opus, literally "great work".
Synonyms
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Rhymes for magnum opus
See all rhymes for magnum opus →Frequently asked questions
What is the difference between a magnum opus and a masterpiece?
A masterpiece is any work of outstanding quality, and a creator can produce several. A magnum opus is specifically the single greatest work of a particular person's career, so each artist has only one — and it is usually identified in hindsight.
What is the plural of magnum opus?
The Latin plural is magna opera, but it sounds pedantic in English and rarely appears. "Magnum opuses" is widely used and perfectly acceptable.
Does a magnum opus have to be long?
No. The phrase means "great work" in the sense of importance rather than size. A short poem or a single painting can be an artist's magnum opus if it is the achievement that defines them.
What is the meaning of magnum opus?
"magnum opus" (noun) means the greatest and most important work produced by an artist, writer or composer, usually the one they are remembered for.
