Concentration camp
A concentration camp or extermination camp was a location where people, usually civilians, were imprisoned. Those imprisoned usually belonged to a group regarded as undesirable or inferior by the authority imprisoning them.

Nazi Germany operated many concentration camps during the 1930s and '40s, where millions of people were killed. 

In 2370, Quark told Benjamin Sisko that the Ferengi had nothing as barbaric as them. ()

In an alternate timeline, Vosk pitched the use of non-Aryan-targeting plagues as an alternative for extermination camps to a Nazi general. ()

See also 
 Death camp
 Extermination facility
 Genocide
 Labor camp
 Internment camp
 Prison camp
 Refugee camp

External link 
 

de:Konzentrationslager
Earth
Punishments
Settlement types