Definition of filtration camp in English:

filtration camp

noun

  • 1A camp established by the Soviet Union during the Second World War (1939–45) in order to screen citizens of Soviet territories who had been imprisoned by German forces or had been living in countries under German occupation (now historical).

  • 2A prison camp created (often illegally) by Russian forces in Chechnya during the conflicts between Russian and Chechen forces in the 1990s and the first decade of the 21st cent.

Origin

Early 20th century; earliest use found in The New York Times. In specific uses after Russian fil′trаciоnnyj lаgеr′.