noun: (military, historical) One of an active and hardy body of soldiers in the French service, originally Kabyle, but now composed of Frenchmen who wear the Kabyle dress.
noun: (military, historical, by extension) One of a body of soldiers who adopt the dress and drill of the Zouaves in French service, as was done by a number of volunteer regiments in the army of the United States in the Civil War (1861–65).