Gulag (noun)

1. A system of Soviet labor camps and prisons, in operation from the early 1920s to the mid-1950s, used to imprison and punish political opponents, criminals, and other perceived enemies of the state.
2. A prison or labor camp, particularly those operated by Soviet Union.

Origin:

From russian, acronym of glavnoe upravlenie lagerei (main camp administration).

Examples:

1. The gulag was a system of Soviet labor camps and prisons used to imprison political opponents and other perceived enemies of the state.
2. He was sent to a gulag for speaking out against the government.
3. The gulag system was notorious for its brutal conditions and high death rates.
4. Many people died in the gulag camps from overwork and starvation.
5. The gulag was a network of labor camps across the Soviet Union.