Majors meaning : A military rank between captain and lieutenant colonel. The main area of study of a student working toward a degree at a college or university. A student at a college or university concentrating on a given area of study. A person of legal age. The major premise. A touchdown, or major score. A large, commercially successful company, especially a record label that is bigger than an indie. (British slang) An elder brother (especially at a public school). A large leaf-cutter ant that acts as a soldier, defending the nest.