# magnum opus

> English word · Noun · IPA /ˌmæɡnəm ˈəʊpəs/

## Definitions
1. A great or important work of literature, music or art, a masterpiece.
2. The best, most popular, or most renowned achievement of an author or artist, representing their major life effort.
3. The process of working with the prima materia to create the philosopher's stone.

## Etymology
From Latin magnum opus (“great work”).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/magnum-opus