Definition of bencher:
(n) :
(Canada, law) A senior member of a law society in a Canadian province (except New Brunswick).
(n) :
(British, law) One of the senior governing members of an Inn of Court.
(n) :
(obsolete) One who frequents the benches of a tavern; an idler.
(n) :
(obsolete) A member of a court or council.
(n) :
(UK, obsolete) An alderman of a corporation.