Training expected to produce a specific character or pattern of behavior, especially training that produces moral or mental improvement: was raised in the strictest discipline. Control obtained by enforcing compliance or order: military discipline. Controlled behavior resulting from disciplinary training; self-control: Dieting takes a lot of discipline. A state of order based on submission to rules and authority: a teacher who demanded discipline in the classroom. Punishment intended to correct or train: subjected to harsh discipline. A set of rules or methods, as those regulating the practice of a church or monastic order. A branch of knowledge or teaching: the discipline of mathematics. To train by instruction and practice, as in following rules or developing self-control: The sergeant disciplined the recruits to become soldiers. See Synonyms at teach. To punish in order to gain control or enforce obedience. See Synonyms at punish. To impose order on: needed to discipline their study habits.