Dictionary
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.