Căs'tel-lan, n.

noun

n. [Lat. castellānus, pertaining to a castle, an occupant of a castle, L. Lat. a governor of a castle, from castellum, castle, citadel, dim. of castrum, fortified place; It. & O. Sp. castellano, Pr. & Sp. castellan, N. Fr. châtelain. See CASTLE.] A governor or constable of a castle.