military intelligence, section six. officially known as secret intelligence service of the united kingdom.
by Anonymous February 27, 2003
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The Secret Intelligence Service (SIS) or Military Intelligence Service 6; roughly the British equivalent of the CIA.

Also known as Her Majesty's Service; in fiction, it is the patron of James Bond.
Mi 5= FBI
Mi 6= CIA
by Spartan February 27, 2005
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The United Kingdom's "secret" military intelligence.

Also, mi6 is a great wordpunk/wordrock band.
by mi6isagoodband April 22, 2003
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MI6 was formed in 1909 as the Secret Service Bureau. The Secret Intelligence Service (SIS) is frequently referred to by the name MI6 (Military Intelligence, Section 6), a name used as a flag of convenience during the Second World War when it was known by many names. The existence of MI6 was not officially acknowledged until 1994.
by Dancing with Fire September 5, 2012
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Mission: Impossible 6 or Mission: Impossible Fallout is a 2018 film directed by Christopher Mcquarrie and starring Tom Cruise, Henry Cavill and Rebecca Ferguson, and is a part of the Mission: Impossible film franchise.
"?have you seen MI6"
"Yeah, it was cool"
by Saul good man October 28, 2018
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