Definition of MI6 in English:

MI6

Syllabification: MI6
Pronunciation: /ˌemˌīˈsiks
 
/
(In the UK) the governmental agency responsible for dealing with matters of internal security and counter-intelligence overseas. Formed in 1912, the agency was officially named the Secret Intelligence Service in 1964, but the name MI6 remains in popular use.

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Word of the day flippant
Pronunciation: ˈflipənt
adjective
not showing a serious or respectful attitude