Definition of en banc in English:

en banc

(also en banque, en bank)

adverb

  • With all (or a majority or quorum) of the judges of a court present; before or by the full bench.

adjective

  • That is heard, conducted, or arrived at by or with all (or a majority or quorum) of the judges of a court present; (of a court) sitting en banc.

Origin

Mid 19th century. Apparently an alteration of in bank after French en in and either French banc bench or perhaps English banc, medieval variant of bank.

Pronunciation

en banc

/ɛn ˈbank/