(obsolete) A dandy or fop. / (obsolete) An effeminate man.

(UK, education, historical) At the University of Oxford, a student ranking above commoners but below noblemen.

A member of the Honourable Corps of Gentlemen at Arms, a bodyguard to the British monarch, instituted in 1509 and now having only ceremonial duties.

The husband (or man of similar rank) of a chief executive of a nation; especially the husband of the President of a country. / (US) The husband of a governor or mayor.

(euphemistic) The Devil.

The male spouse of the second-in-command or first in the line-of-succession of a political jurisdiction.

(generic) A man that is or was a spouse of the political chief executive, when speaking non-specifically.

A man that is or was a spouse of the political second-in-command or first in the line-of-succession of a political jurisdiction.

(UK, slang, obsolete) A playing card that is almost imperceptibly longer than the others in the deck, used by cheats. / Used other than figuratively or idiomatically: see old, gentleman.

plural of Gentleman Jim