The position, authority, or office of a captain; a captain's domain or period of command.
From captain plus -ry, a suffix forming nouns of office or practice (as in 'archery' or 'bravery'). This term is chiefly historical or literary.
The 'captainry' represented a specific type of power—medieval captains governed fortresses and towns almost as independent rulers, collecting taxes and dispensing justice under a distant king's vague authority.
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