peer of the realm noun3 •(UK) Any member of the House of Lords who is not a life peer. •(UK) Any member of the hereditary peerage of the United Kingdom, (chiefly) of the Kingdom of England.The proudest Peere in the Realme shall not weare a head on his shoulders vnlesse he pay me tribute. — 1591 •Any similar member of the nobility of other kingdoms. formspeers of the realm