proper name · an archaic and respectful term used by a wife to address or refer to her husband

郎君远道而来，辛苦了。

noun · a man who manages prostitutes or acts as a broker in a brothel

那个老郎君在这一带的烟花巷小有名气。

noun · a son of a wealthy family who spends his time seeking pleasure

他整日与一群富家郎君混迹于酒楼。