investigation/In͵vɛstəˋgeʃən; InˌvestIˈɡeIʃ$n/n [C,U] an official attempt to find out about something, especially a crime or accident〔尤指对犯罪事件或事故的〕调查﹐侦察: a murder investigation 谋杀案调查+into Police have launched an investigation into the tragedy. 警方已对这起惨案展开调查。under investigation (=being investigated) 正在调查中 The case is still under investigation. 此案仍在调查中。