Definitions
1.NounAny well-bred, well-mannered, or charming man.
2.NounAny man."Please escort this gentleman to the gentlemen's room."
3.NounA man of gentle but not noble birth, particularly a man of means (originally ownership of property) who does not work for a living but has no official status in a peerage; an armigerous man ranking below a knight."Being a gentleman, Robert was entitled to shove other commoners into the gongpit but he still had to jump out of the way of the knights to avoid the same fate himself."
4.NounAn effeminate or oversophisticated man."Well, la-di-da, aren't you just a proper gentleman?"
5.NounAn amateur or dabbler in any field, particularly those of independent means.
6.NounAn amateur player, particularly one whose wealth permits him to forego payment.