quisling

[ kwiz-ling ]
/ ˈkwɪz lɪŋ /

noun

a person who betrays his or her own country by aiding an invading enemy, often serving later in a puppet government; fifth columnist.

Origin of quisling

1940; after Vidkun Quisling (1887–1945), pro-Nazi Norwegian leader
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for quisling

quisling

/ (ˈkwɪzlɪŋ) /

noun

a traitor who aids an occupying enemy force; collaborator

Word Origin for quisling

C20: after Major Vidkun Quisling (1887–1945), Norwegian collaborator with the Nazis
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012