1.
somebody who is granted a title and seat in the British House of Lords that cannot be inherited
2.
somebody who is granted a title and seat in the House of Lords that cannot be inherited. People are often made life peers when they have failed to be re-elected to the House of Commons, to allow them to continue to work on behalf of their political party.
3.
a British peer whose family cannot keep the title after he or she dies. Peers who can pass their title to their children are called hereditary peers.