MI5 en · PROPN
Etymology
Abbreviation of Military Intelligence, Section Five.
Meanings
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The domestic intelligence and counter-espionage agency of the United Kingdom, which operates in secret and whose primary function is to spy on terrorist organizations and others viewed as a threat to British national security. Formally known as the Security Service.
The service aggressively maintained its position until I produced evidence proving it was untrue - including a recording of one of the calls with a senior MI5 officer.
2025 July 6, Daniel De Simone, “How MI5 piled falsehood on falsehood in court in the case of a spy who abused women”, in BBC News, retrieved 06 Jul 2025:
Relateds
SAS · GCHQ · SBS · MI9 · MI6 · SIS
Synonyms
Five · Security Service · 5