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Secret Intelligence Service

The official name for the UK's foreign intelligence agency, widely known by its popular designation MI6.

ˈsikɹət ɪnˈtɛləd͡ʒəns ˈsɝvəsDocumented since 1900s1900shistorical111 viewsLast reviewed Jun 29, 2026+ Add a definition
🇬🇧 British & Irish slang
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Born ~1909 · no dated citations yet
1909BornToday, 2026

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UK
#1·Apr 28, 2026UK

The official name for the UK's foreign intelligence agency, widely known by its popular designation MI6. Operating under the Foreign, Commonwealth and Development Office, the Secret Intelligence Service collects intelligence abroad to support national security. In popular culture, it's become shorthand for suave spycraft — think James Bond's employer — though the real organization is considerably more bureaucratic and secretive than any Hollywood portrayal.

The novel's protagonist is recruited by the Secret Intelligence Service after his cover as a diplomat is blown.
Origin: Formally established in 1909 as the Secret Service Bureau; the MI6 designation comes from wartime military intelligence departmental numbering. Editorial expansion authored on Slangora.
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UK
#2·Apr 27, 2026UK

(UK, formal) MI6.

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🇬🇧About British & Irish slang slang

UK and Irish slang — Cockney, Scouse, Geordie, Yorkshire, Glaswegian, Brummie, Welsh, West Country, plus Irish English. Centuries of regional dialects feeding into modern British and Irish street talk.

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