investigate in‧ves‧ti‧gate [ɪnˈvestgeɪt] verb [intransitive, transitive]
to try to discover the truth about a crime, accident etc:

• The fraud office is investigating allegations of insider trading by a former employee of the firm.

— investigation noun [countable, uncountable] :

• a banker under criminal investigation

a federal investigation into junk bond trading

— investigator noun [countable] :

• a government investigator

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investigate UK US /ɪnˈvestɪgeɪt/ verb
[I or T] to examine a crime, problem, statement, etc. carefully, especially to discover the truth: »

The FBI was called in to investigate.


Detectives will continue to investigate the incident.

investigate allegations/claims/complaints of sth »

The office is investigating the allegations of embezzlement.

investigate how/whether/why »

The commission will investigate whether these companies violated anti-trust laws.

[T] to try to discover the truth about someone who is accused of a crime: investigate sb for sth »

The IRS are investigating Williams for alleged tax fraud.

investigator noun [C]

Investigators discovered that the bank had covered up massive bad loans.

Financial and business terms. 2012.