the title given to the Member of Parliament who has been a member of the House of Commons for the longest time without interruption, and to the peer who has been a member of the House of Lords for the longest time.
FATHER OF THE HOUSE
Meaning of FATHER OF THE HOUSE in English
Oxford guide to British and American culture English vocabulary. Руководство по британской и американской культуре, Оксфордский английский словарь. 2005