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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.
MI6 by Dancing with Fire September 5, 2012
Related Words
mi6 mi6o
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
mi6 by Spartan February 26, 2005
The United Kingdom's "secret" military intelligence.

Also, mi6 is a great wordpunk/wordrock band.
mi6 by mi6isagoodband April 22, 2003
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"
MI6 by Saul good man October 28, 2018
the UK’s Secret Intelligence Service - also known as MI6. Our people work secretly around the world to make the UK safer and more prosperous. This group is lead by none other then the GOATS Joel, Blessan and Jermi. This group has exposed numerous lies and secrets and put people to shame. Beware.
Look MI6 Agents, They must be Sigmas.
MI6 by Uynteuro May 12, 2024
(UK GOVERNMENT) also spelled MI6; the Secret Intelligence Service. Under the control of the Home Secretary, along with MI-5 and General Communications Headquarters (GCHQ).

There is no simple division of labor between the two agencies; MI-5 usually is involved with domestic operations, and MI-6 is usually involved in overseas operations, but the real distinction is that one houses one group of agencies, and the other houses another. Like MI-5, the SIS/MI-6 was founded in 1909 as a joint operation between the Admiralty and the War Office.

During the Cold War, the agency was badly compromised by pro-Soviet staff (the "Cambridge Spy Ring"). It later recovered from Soviet penetration and recruited Col. Oleg Penkovsky.
MI-6 was involved in several notorious schemes, such as Operation Ajax (Iran) and the ouster of Patrice Lumumba (Congo) and Jeddi Kagan (Guyana).
MI-6 by Primus Intra Pares July 19, 2010