oyer and terminer

== English == === Etymology === From Middle English oier and terminer, oyer and termyner, from Anglo-Norman oyer (“hear”) and terminer (“determine”). === Noun === oyer and terminer (countable and uncountable, plural oyer and terminers or oyers and terminers) (law, archaic) A commission under which a court is empowered to hear and determine a criminal case. (law, archaic) The hearing or trial carried out under such authority.