1520s, "smuggling;" 1590s, "smuggled goods;" from Middle French contrebande "a smuggling," from older Italian contrabando (modern contrabbando) "unlawful dealing," from Latin contra "against" (see contra) + Medieval Latin bannum, from Frankish *ban "a command" or some other Germanic source (see ban (v.)).
in the laws of war, goods that may not be shipped to a belligerent because they serve a military purpose.