MI5
English
[edit]Etymology
[edit]Abbreviation of Military Intelligence, Section Five.
Proper noun
[edit]MI5
- 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.
- Synonyms: (formally) Security Service, Five, 5
- 1956, Ian Fleming, chapter 2, in Diamonds Are Forever:
- ‘Why not let the Special Branch or MI5 handle it, Sir?’ asked Bond, reflecting that M seemed to be going through a bad phase of mixing in other people's business.
- 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[1], archived from the original on 19 March 2026:
- 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.
