gen‧tle‧man S3 W2 plural gentlemen [countable]
a polite word for a man, used especially when talking to or about a man you do not know [↪ lady]:
Could you serve this gentleman please, Miss Bath?
Good morning, ladies and gentlemen.
An elderly gentleman was asleep next to the fire.
a man who is always polite, has good manners, and treats other people well [↪ lady]:
Martin - always the perfect gentleman - got to his feet when my mother walked in.
Mr Field was a real gentleman.
a man from a high social class, especially one whose family owns a lot of property [↪ lady]:
an English country gentleman