The student body of an educational institution. An institution for the instruction of children or people under college age. An institution for instruction in a skill or business: a secretarial school; a karate school. A college or university. An institution within or associated with a college or university that gives instruction in a specialized field and recommends candidates for degrees. A division of an educational institution constituting several grades or classes: advanced to the upper school. The building or group of buildings housing an educational institution. The process of being educated formally, especially education constituting a planned series of courses over a number of years: The children were put to school at home. What do you plan to do when you finish school? A session of instruction: School will start in three weeks. He had to stay after school today. A group of people, especially philosophers, artists, or writers, whose thought, work, or style demonstrates a common origin or influence or unifying belief: the school of Aristotle; the Venetian school of painters. A group of people distinguished by similar manners, customs, or opinions: aristocrats of the old school. Close-order drill instructions or exercises for military units or personnel. Australian A group of people gathered together for gambling. To educate in or as if in a school. To train or discipline: She is well schooled in literature. See Synonyms at teach. Of or relating to school or education in schools: school supplies; a school dictionary. A large group of aquatic animals, especially fish, swimming together; a shoal. See Synonyms at flock1. To swim in or form into a school.