Middle English; earliest use found in Statutes of the Realm. From Anglo-Norman adjeccion, adjeccioun, Anglo-Norman and Middle French adjection (French †adjection) something that has been added or appended, act of adding or appending something and its etymon classical Latin adiectiōn-, adiectiō act of adding, addition, anything added, additional clause or proviso from adiect-, past participial stem of adiicere + -iō.