- IPA[ˌmaɡnəm ˈəʊpəs]
- a work of art, music, or literature that is regarded as the most important or best work that an artist, composer, or writer has produced.
noun: magnum opus, plural noun: magnum opuses
- IPA[ˌmaɡnəm ˈōpəs]
- a large and important work of art, music, or literature, especially one regarded as the most ...
Oxford American Dictionary