/ Dictionary / Index D disciplinarian: Meaning and Definition of Find definitions for: dis•ci•pli•nar•i•an Pronunciation: (dis"u-plu-nâr'ē-un), [key] — n. a person who enforces or advocates discipline: The teacher was a formidable disciplinarian. —adj. disciplinary. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: disciplinarian (Thesaurus) disciplinable disciplinary Related Content Daily Word Quiz: diaphanous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language