Gulag
Concise Oxford English Dictionary © 2008 Oxford University Press:
Gulag /ˈguːlag/
▶noun (the Gulag) a system of harsh labour camps maintained in the Soviet Union 1930–55.
– origin Russ., from G(lavnoe) u(pravlenie ispravitel′no-trudovykh) lag(ereĭ) ‘Chief Administration for Corrective Labour Camps’.
'Gulag' also found in these Oxford entries:

