Cas"tel*lan (?), n. [OF. castelain, F. chatelain, L. castellanus pertaining to a castle, an occupant of a castle, LL., a governor of a castle, fr. L. catellum castle, citadel, dim. of castrum fortifled place. See Castle, and cf. Chatelaine.]
A governor or warden of a castle.
© Webster 1913.