(UK, _, military, informal, obsolete) A captain of the 18th or 19th-century Royal Navy in command of a vessel, with his subsequent promotions almost always determined by seniority rather than merit or ability.
1836 March 17, 'Candor', "The Navy", [https://babel.hathitrust.org/cgi/pt?id=nyp.33433009300660&seq=177&view=1up Army and Navy Chronicle], Vol. II, No. 11, [https://babel.hathitrust.org/cgi/pt?id=nyp.33433009300660&seq=189 p. 173]:
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