The definition of an adjective is a part of speech that is used to describe a noun. Red, tall, better and fast are all examples of adjectives.
In modern parlance, a gentleman (from gentle + man, translating the Old French gentilz hom) is any man of good, courteous conduct. A gentleman may also simply be a polite term for any man, as in indications of gender-separated facilities, or as a sign of the speaker's own courtesy when addressing others. The modern female equivalent is lady.
1 : a man with very good manners. 2 : a man of any social position Hint: This word is used especially in polite speech or when speaking to a group of men. Good evening, ladies and gentlemen. 3 : a man of high social status He's a gentleman by birth.