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Definition of the Federal Bureau of Investigation noun from the Oxford Advanced Learner's Dictionary

the Federal Bureau of Investigation

noun

/ðə ˌfedərəl ˌbjʊərəʊ əv ɪnˌvestɪˈɡeɪʃn/

/ðə ˌfedərəl ˌbjʊrəʊ əv ɪnˌvestɪˈɡeɪʃn/

(abbreviation FBI)

[singular]

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the police department in the US that is controlled by the national government and that is responsible for dealing with crimes that affect more than one state

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See the Federal Bureau of Investigation in the Oxford Advanced American Dictionary

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noun

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