Greater than others in importance or rank, Requiring great attention or concern; very serious, Designating a scale or mode having half steps between the third and fourth and the seventh and eighth degrees, noun_ A commissioned rank in the US Army, Air Force, or Marine Corps that is above captain and below lieutenant colonel, A field of study chosen as an academic specialty, A chord containing a major third between the first and second notes and a minor third between the second and third notes, intransitive verb_ To pursue academic studies in a major