a police force that operates secretly, esp. for suppressing opposition to the government
A police force operating largely in secret and often using terror tactics to suppress dissent and political opposition.
(uncountable) (often treated as a plural)
- A police force operating in secrecy and outside the normal boundaries of law and hidden from the public, usually in support of a totalitarian government's political policies to suppress political dissent through the use of methods such as (but not limited to) intimidation, violence, and surveillance.