KGB

The term refers specifically to the Committee for State Security of the Soviet Union. Because it is a proper noun representing a single, specific organization, it is used as a singular entity. It carries a heavy historical connotation of surveillance, political repression, and clandestine operations.

In modern discourse, the term is often used as a metonym for Soviet-era espionage or as a shorthand to describe any pervasive and secretive state security apparatus, though its primary definition remains tied to the historical Soviet agency.