| Date: | 1500-1600 |
| Language: | Latin |
| Origin: | , past participle of investigare 'to follow the track of', from vestigium 'track' |
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in‧ves‧ti‧gate W2

1 [intransitive and transitive] to try to find out the truth about or the cause of something such as a crime, accident, or scientific problem :
The state police are investigating the incident.
The study investigates the impact of violent TV programming on children.
I heard a noise and went downstairs to investigate.
The state police are investigating the incident.
The study investigates the impact of violent TV programming on children.
I heard a noise and went downstairs to investigate.2 [transitive] to try to find out more about someone's character, actions etc, because you think they may have been involved in a crime :
Penney was already being investigated by the police on suspicion of murder.
Penney was already being investigated by the police on suspicion of murder.WORD FOCUS: police 
people in the police force: police officer, policeman, policewoman, detective, cop informal
the building where the police work: police station
what the police do: investigate crimes, find/collect evidence, arrest people who they think are guilty of a crime, question/interrogate people about crimes, hold/detain people in custody, charge people with crimes, release people if they are innocent
➔ See also police

people in the police force: police officer, policeman, policewoman, detective, cop informal
the building where the police work: police station
what the police do: investigate crimes, find/collect evidence, arrest people who they think are guilty of a crime, question/interrogate people about crimes, hold/detain people in custody, charge people with crimes, release people if they are innocent
➔ See also police