A Peerage is a form of crown distinction, with Peerages in the United Kingdom comprising both hereditary and lifetime titled appointments of various ranks, which form both a constituent part of the legislative process and the British honours system within the framework of the Constitution of the United Kingdom.
The peerage forms the highest rung of what is termed the "British nobility". The term peerage can be used both collectively to refer to this entire body of titled nobility (or a subdivision thereof), and individually to refer to a specific title (modern English language-style using an initial capital in the latter case but not the former). British peerage title holders are termed peers of the Realm. "Lord" is used as a generic term to denote members of the peerage; however, individuals who use the appellation Lord or Lady are not always necessarily peers (for example some judicial, ecclesiastic and others are often accorded the appellation "Lord" or "Lady" as a form of courtesy title as a product of their office).