The governor or caretaker of a castle or keep.

plural of castellan

An ancient Spanish coin. / An ancient Spanish unit of weight.

plural of castellanus

plural of castellano

(meteorology) A cloud species which shows vertical formations giving a crenellated appearance, associated with cirrus, cirrocumulus, altocumulus, and stratocumulus genera. / Alternative form of castellan

plural of castellany

(historical) The office of a castellan, the lordship of a castle. / (historical) The jurisdiction of a castellan, the district controled by a castle.

plural of Castellanos

A surname.