Definition of investigation noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ɪnˌvestɪˈɡeɪʃn//
    ; NAmE NAmE//ɪnˌvestɪˈɡeɪʃn//
    [countable, uncountable] Solving crime
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  1. 1  an official examination of the facts about a situation, crime, etc. a criminal/murder/police investigation She is still under investigation. investigation into something The police have completed their investigations into the accident. CollocationsCrimeCommitting a crime commit a crime/​a murder/​a violent assault/​a brutal killing/​an armed robbery/​fraud be involved in terrorism/​a suspected arson attack/​people smuggling/​human trafficking engage/​participate in criminal activity/​illegal practices/​acts of mindless vandalism steal somebody’s wallet/​purse/(British English) mobile phone/(North American English) cell phone rob a bank/​a person/​a tourist break into/ (British English) burgle/ (North American English) burglarize a house/​a home/​an apartment hijack a plane/​ship/​bus smuggle drugs/​weapons/​arms/​immigrants launder drug money (through something) forge documents/​certificates/​passports take/​accept/​pay somebody/​offer (somebody) a bribe run a phishing/​an email/​an Internet scamFighting crime combat/​fight crime/​terrorism/​corruption/​drug trafficking prevent/​stop credit-card fraud/​child abuse/​software piracy deter/​stop criminals/​burglars/​thieves/​shoplifters/​vandals reduce/​tackle/​crack down on knife/​gun/​violent/​street crime; (especially British English) antisocial behaviour foil a bank raid/​a terrorist plot help/​support/​protect the victims of crimeInvestigating crime report a crime/​a theft/​a rape/​an attack/(especially British English) an incident to the police witness the crime/​attack/​murder/​incident investigate a murder/(especially North American English) a homicide/​a burglary/​a robbery/​the alleged incident conduct/​launch/​pursue an investigation (into…); (especially British English) a police/​murder inquiry investigate/​reopen a criminal/​murder case examine/​investigate/​find fingerprints at the crime scene/​the scene of crime collect/​gather forensic evidence uncover new evidence/​a fraud/​a scam/​a plot/​a conspiracy/​political corruption/​a cache of weapons describe/​identify a suspect/​the culprit/​the perpetrator/​the assailant/​the attacker question/​interrogate a suspect/​witness solve/​crack the case See related entries: Solving crime
  2. 2  investigation (into something) a scientific or academic examination of the facts of a subject or problem synonym enquiry an investigation into the spending habits of teenagers
  3. Word Originlate Middle English: from Latin investigatio(n-), from the verb investigare, from in- ‘into’ + vestigare ‘track, trace out’.Extra examples After conducting preliminary investigations, government lawyers will set out areas of concern. An official investigation concluded that 9 000 people were killed or went missing during that period. Closer investigation showed a flaw in this theory. Closer investigation showed this idea to be untenable. He called for investigation into the hospital’s management. He was on trial for allegedly obstructing an investigation into the bank’s dealings. On investigation, the noise turned out to be only a door banging. Police are still pursuing their investigations. Police have launched an investigation into the allegations. The authorities conducted an extensive investigation into his tax affairs. The board of directors commissioned its own internal investigation. The matter is the subject of a police investigation, and we cannot comment. The matter is the subject of a police investigation, and we have been advised not to comment. The ongoing investigation has led to numerous intelligence leads. The singer is currently under investigation for possessing illegal drugs. These claims certainly warrant further investigation. The Opposition are calling for an in-depth investigation into the practice. The government has ordered an official investigation into the matter. These are the same methods used in criminal investigations. We are awaiting the results of the investigation.
See the Oxford Advanced American Dictionary entry: investigation