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  1. in·ves·ti·ga·tion
    IPA[inˌvestəˈɡāSH(ə)n]
  2. noun

    • 1. the action of investigating something or someone; formal or systematic examination or research:

      he is under investigation for receiving illicit funds
    • 2. a formal inquiry or systematic study:

      an investigation has been launched into the potential impact of the oil spill
  3. Variation

    • n.: noun: investigation, plural noun: investigations

    • noun

      the action of investigating something or someone; formal or systematic examination or research:

      a formal inquiry or systematic study:

    • an agency of the US federal government that deals principally with internal security and counter-intelligence and that also conducts investigations in federal law enforcement. It was established in 1908 as a branch of the Department of Justice, but was substantially reorganized under the controversial directorship (1924–72) of J. Edgar Hoover.
    • an agency of the US federal government that deals principally with internal security and counter-intelligence and that also conducts investigations in federal law enforcement. It was established in 1908 as a branch of the Department of Justice, but was substantially reorganized under the controversial directorship (1924–72) of J. Edgar Hoover.
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