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MI6

American  
[em-ahy-siks] / ˈɛmˌaɪˈsɪks /

noun

  1. the government's secret intelligence service.


MI6 British  

abbreviation

  1. Military Intelligence, section six; a former official and present-day popular name for the intelligence and espionage agency of the British Government

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of MI6

M(ilitary) I(ntelligence, Section) 6

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Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The parliamentary committee also criticised MI5 and MI6 for their conduct in relation to the alleged 9/11 mastermind Khalid Sheikh Mohammed, raising the question of whether he could bring a similar legal claim.

From BBC • Jan. 11, 2026

At the British embassy in Vilnius, Lithuania, he was taken seriously by MI6, which was astounded by the wealth of information the former archivist had to offer.

From The Wall Street Journal • Jan. 6, 2026

Since MI6 was short on cash, the CIA funded Mitrokhin’s resettlement in Britian in exchange for access to his notes and transcriptions.

From The Wall Street Journal • Jan. 6, 2026

This is made up of the DGSE, which looks at matters overseas, and is the French equivalent of the UK's MI6 or the US's CIA.

From BBC • Jan. 4, 2026

The escape instructions, prepared carefully by his MI6 handlers, had been sealed into the hardcover binding of a book.

From "Spies: The Secret Showdown Between America and Russia" by Marc Favreau

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