Nobility has two everyday meanings. First, it's the group of people born into high social rank — kings, queens, dukes, lords — the aristocratic class, especially in old European society. Second, it means a very fine, generous, honorable quality in a person's character — someone who acts with real nobility puts others first, is honest, and doesn't seek reward. Both meanings share the idea of being "above the ordinary" — one in social rank, one in moral character.