(physics) A detector of particles and ionizing radiation which uses a photomultiplier to generate flashes of light

(dated) The topmost covering of a bed, often functioning as a blanket; a coverlet, bedspread.

Any action taken to counteract or correct another. / (military, chiefly in the plural) Any of the devices and techniques used to impair the operational effectiveness of an enemy.

A staged trial, running in parallel with a real one that is thought to be politically motivated or otherwise rigged, in which the truth can be made public.

counterespionage

the part of a cheque that is retained in the chequebook as a record; a stub

A person who counterfeits

All those activities undertaken to neutralize or exploit the espionage activities of another nation or an enemy.

A revolution aiming to reverse the political or social changes instigated by a previous revolution.

Any culture whose values and lifestyles are opposed to those of the established mainstream culture, especially to western culture.