gulag

Short definition from Wiktionary

Noun

1. 1
   Also GULAG: the system of all Soviet labour camps and prisons in use, especially during the Stalinist period (1930s–1950s).
2. 2
   A prison camp, especially one used to hold political prisoners.
3. 3
   A place where, or political system in which, people with dissident views are routinely oppressed.
4. 4
   Alternative letter-case form of gulag.
5. 5
   Alternative letter-case form of gulag.

Verb

1. 1
   To compel (someone) into a forced labour camp or a similar place of confinement or exile.

Proper noun

1. 1
   The government agency in charge of the Soviet Union's network of forced labour camps, which was established in 1918 and formally abolished in 1960.