mag·num o·pus (noun)ˌmaɡnəm ˈōpəs/a large and important work of art, music, or literature, especially one regarded as the most important work of an artist or writer.
mag·num o·pus (noun)ˌmaɡnəm ˈōpəs/a large and important work of art, music, or literature, especially one regarded as the most important work of an artist or writer.