noun
(historical) Also GULAG: the system of all Soviet labour camps and prisons in use, especially during the Stalinist period (1930s–1950s).
A prison camp, especially one used to hold political prisoners.
A place where, or political system in which, people with dissident views are routinely oppressed.
verb
(transitive, informal, also figuratively) To compel (someone) into a forced labour camp or a similar place of confinement or exile.