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.
Gentlemen, which means boys, be courteous to the old maids, no matter how poor and plain and prim, for the only chivalry worth having is that which is the readiest to pay deference to the old, protect the feeble, and serve womankind, regardless of rank, age, or color. View in context.