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English definition of “investigate”

investigate

verb [I/T]  /ɪnˈves·tɪˌɡeɪt/ us  
to examine something carefully, esp. to discover the truth about it: [I] There was a suspicious man near the playground, and we asked the police to investigate. [T] The school created an independent review board to investigate charges of misconduct.
investigator
noun [C]  /ɪnˈves·tɪˌɡeɪ·t̬ər/ us  
She hired a private investigator to check into her husband’s activities.
(Definition of investigate from the Cambridge Academic Content Dictionary © Cambridge University Press)
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