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English definition of “disciplinarian”

disciplinarian

noun [C]     /ˌdɪs.ə.plɪˈneə.ri.ən/ US  /-ˈner.i-/
someone who believes in keeping complete control of the people he or she is in charge of, especially by giving severe punishments : a strict disciplinarianSevere
(Definition of disciplinarian noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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