general, title and rank of a senior army officer, usually one who commands units larger than a regiment or its equivalent or units consisting of more than one arm of the service. Frequently, however, a general is a staff officer who does not command troops but who plans their operations in the field. General, lieutenant general, and major general are the first, second, and third grades of general officers in many armies. The United States Army, Air Force, and Marines have a fourth general officer grade, brigadier general (brigadier in the British Army).
