Definition of MI5 in English:


Line breaks: MI5
Pronunciation: /ɛmʌɪˈfʌɪv
(In the UK) the governmental agency responsible for dealing with internal security and counter-intelligence on British territory. Formed in 1909, the agency was officially named the Security Service in 1964, but the name MI5 remains in popular use.


from Military Intelligence section 5.

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Pronunciation: ˈrɛtrə(ʊ)flɛks
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