dis ‧ ci ‧ pli ‧ na ‧ ry /ˈdɪsəplɪnəri, ˈdɪsɪplɪnəri, ˌdɪsəˈplɪ- $ ˈdɪsəpləneri/ BrE AmE adjective
[ Word Family: noun : ↑ disciplinarian , ↑ discipline ; adjective : ↑ disciplinary , ↑ disciplined ≠ UNDISCIPLINED ; verb : ↑ discipline ]
relating to the punishment of someone who has not obeyed rules, or to trying to make people obey rules:
The investigation led to disciplinary action (=things you do to punish someone) against two officers.
disciplinary hearing/committee (=a meeting or group that decides if someone should be punished)