1 a man (in polite or formal use).
2 a chivalrous or well-bred man.
3 a man of good social position or of wealth and leisure (country gentleman).
4 a man of gentle birth attached to a royal household (gentleman in waiting).
5 (in pl. as a form of address) a male audience or the male part of an audience.
Phrases and idioms:
gentleman-at-arms one of a sovereign's bodyguard. gentleman farmer a country gentleman who farms. gentleman's (or -men's) agreement one which is binding in honour but not legally enforceable.
Etymology: GENTLE + MAN after OF gentilz hom
Useful english dictionary. 2012.