The Latin meaning for "Great Work". Usually meaning the greatest, most popular, pinnacle, or most renowned achievement of an artist, artist or composer. Or a "masterpiece"
Songs for the Deaf is Queens of the Stone Age's magnum opus.
A politically un-enslaved man. A man with high, definite principles. A man who does not ask for office; nor accept office. A man who votes for the best man, regardless of his party name.