A gentleman is a polite and respectful man who knows how to behave in social situations.
If you think of a person who's always courteous, considerate, and well-mannered, that's what we mean by "gentleman". We often use the word to describe someone who opens doors for others, uses good table manners, and doesn't talk loudly or crudely. A gentleman is also someone who treats people with kindness and respect, regardless of their social status or background. You might hear someone say, "He's a real gentleman, always helping out his neighbors." Or, "At the party, John was the only one who behaved like a true gentleman."
A 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 armiferous man ranking below a knight.
Example: 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.
