investigation
noun [ C or U ]
uk/ɪnˌvestɪˈɡeɪʃən/ usthe careful examination of a crime, problem, statement, etc., especially to discover the truth:
an investigation into sth An investigation into possible insider dealing has been begun by the stock exchange.
the investigation of sth The investigation of the theft of a state data backup device last month continues.
The Financial Services Authority launched an investigation.
criminal/civil/internal investigation
be under investigation (for sth) Several companies are under investigation for fraud.
The Justice Department is conducting investigations of alleged price-fixing at the company.
continuing/ongoing investigation