Definition of investigation in English:



mass noun
  • 1The action of investigating something or someone; formal or systematic examination or research.

    ‘he is under investigation for receiving illicit funds’
    • ‘The second question is whether time needs to be allowed for further investigation.’
    • ‘The cause of the blaze is under investigation, but it is thought to have started accidentally.’
    • ‘The cause of a blaze which destroyed a three storey mill in Radcliffe is under investigation.’
    • ‘He is also under investigation for opening up bogus shell companies to help his clients hide money.’
    • ‘A spokesman for the bus company said the incident was still under investigation.’
    • ‘Probably at any one time, there is a politician under investigation, or on trial or in prison.’
    • ‘The outbreak in Anglesey is at an abattoir which has been under investigation for some time.’
    • ‘The cause of the fire has not been established and is still under investigation.’
    • ‘The cause of the fire is under investigation but is not believed to be arson.’
    • ‘The Ministry of Defence said the cause of the blast was still under investigation.’
    • ‘The fires are being treated as suspicious and are under investigation by police.’
    • ‘He volunteered not to practise at his surgery while under investigation by the police.’
    • ‘A faculty member at the university who initiated the study is now under investigation.’
    • ‘These algae occur on a worldwide basis but the final identity is still under investigation.’
    • ‘It was under investigation for substandard care and abusive treatment to its patients.’
    • ‘Early evaluation did not address this, but such investigation is now under way.’
    • ‘A further three people are now under investigation for a series of alleged offences.’
    • ‘The attack is still under investigation by police and has not been made public until today.’
    • ‘The police chief would not elaborate, saying that the matter was under investigation.’
    • ‘He is under investigation by the Assets Bureau and he needs the lads to help him get to the airport.’
    examination, enquiry, study, inspection, exploration, consideration, analysis, appraisal
    View synonyms
    1. 1.1count noun A formal inquiry or systematic study.
      ‘an investigation into fresh allegations of malpractice’
      ‘a murder investigation’
      • ‘These are the questions at the centre of the author's tactful, patient investigations.’
      • ‘Until such time as a report on these investigations comes to hand then I will suspend judgement.’
      • ‘Two other major investigations of Glasgow City Council employees are still to be carried out.’
      • ‘All I can indicate is that he is of interest to us and investigations are continuing.’
      • ‘The building in Sutton will be used for murder investigations and is due to open in January next year.’
      • ‘An army spokesman would not comment, saying investigations were still going on.’
      • ‘Updates will follow if further products emerge from the on-going investigations.’
      • ‘It will also enable local schools and community groups to become involved in the investigations.’
      • ‘There is wild talk of inquiries and commissions of investigations in the air.’
      • ‘After all the inquiries and investigations and demonstrations, he's still there.’
      • ‘Certainly the legal systems in some countries present obstacles to investigations.’
      • ‘Meanwhile, the sauna remains closed as investigations continue into how the fire broke out.’
      • ‘One of the boys concerned has been temporarily excluded pending investigations by the school.’
      • ‘His investigations have just that effect, and the trawl of weird individuals is phenomenal.’
      • ‘They are also required to help Symantec in investigations into other counterfeiters.’
      • ‘Dean says the theft of her laptop was one of a number of unusual events that took place during her investigations.’
      • ‘This is followed by a formal report once all investigations have been completed.’
      • ‘That shortcoming led to the introduction of the Holmes system for major investigations.’
      • ‘It seems that it has become a fashion to prescribe costly high tech investigations.’
      • ‘Until now the unit's investigations have not considered anyone else being involved.’


Late Middle English: from Latin investigatio(n-), from the verb investigare (see investigate).