[ 'dɪsɪplɪn ]
■ noun
1》 the practice of training people to obey rules or a code of behaviour.
↘controlled behaviour resulting from such training.
↘an activity providing mental or physical training: kung fu is a ~ open to old and young.
2》 a branch of knowledge, especially one studied in higher education.
■ verb
1》 train (someone) to obey rules or a code of behaviour by punishment or rebuke.
↘punish or rebuke formally for an offence.
2》 [as adjective ~d ] showing a controlled form of behaviour.
Derivatives
disciplinable adjective
disciplinal ˌdɪsɪ'plʌɪn(ə)l , 'dɪsɪˌplɪn(ə)l adjective
disciplinary adjective
Origin
ME (in the sense 'mortification by scourging oneself'): via OFr. from L. disciplina 'instruction, knowledge', from discipulus (see disciple ).