beyond what is usual, ordinary, regular, or established: extraordinary costs.
2.
exceptional in character, amount, extent, degree, etc.; noteworthy; remarkable: extraordinary speed; an extraordinary man.
3.
(of an official, employee, etc.) outside of or additional to the ordinary staff; having a special, often temporary task or responsibility: minister extraordinary and plenipotentiary.
Origin: 1425–75;late Middle Englishextraordinarie < Latinextrāordinārius beyond what is ordinary. See extra-, ordinary
early 15c., from L. extraordinarius, from extra ordinem "out of order," especially the usual order, from extra- "out" + ordinem (nom. ordo) "order." Related: Extraordinarily.