1. Personne qui commandait dans un château.
2. (Au féminin) La femme du châtelain.
ETYM Old Fren. castelain, French châtelain, Latin castellanus pertaining to a castle, an occupant of a caste, Late Lat., a governor of a castle, from Latin castellum castle, citadel, dim. of castrum fortified place. Related to Castle, Chatelaine.
A goveror or warden of a castle; governor of castle or fortification; castle governor.