1. (n.) The territory of a duke.

2. (n.) The title or dignity of a duke.

ally archduchy archdukedom baronetcy barony body politic buffer state captive nation chieftaincy chieftainry city-state colony commonweal commonwealth country county domain dominion duchy earldom empery empire free city grand duchy kingdom kingship knight-errantship knighthood ladyship land lordship mandant mandate mandated territory mandatee mandatory marquisate nation nationality pashadom polis polity possession power princedom princeship principality principate protectorate province puppet government puppet regime queenship realm republic satellite seignioralty seigniory seneschalty settlement sovereign nation state sultanate superpower territory toparchia toparchy viscountcy viscountship viscounty