Quisling

thumb|right|300px|Left to right: Vidkun Quisling seated next to [[Heinrich Himmler, Josef Terboven and Nikolaus von Falkenhorst in front of officers of the Waffen-SS, German Army and Air Force in 1941]]

Quisling (, ) is a term used in Scandinavian languages and in English to mean a citizen or politician of an occupied country who collaborates with an enemy occupying force; it may also be used more generally as a synonym for traitor or collaborator. The word originates from the surname of the Norwegian war-time leader Vidkun Quisling (1887–1945), who headed a domestic Nazi collaborationist regime during the Nazi occupation of Norway from 1940 to 1945, during the Second World War.