Nobility is a social class found in many societies that have an aristocracy. It is normally appointed by and ranked immediately below royalty. Nobility has often been an estate of the realm with many exclusive functions and characteristics. The characteristics associated with nobility may constitute substantial advantages over or relative to non-nobles or simply formal functions, and vary by country and by era. Membership in the nobility, including rights and responsibilities, is typically hereditary and patrilineal.
Source:Wikipedia — Nobility →