Bedeutung von “investigation” — Learner’s Dictionary

investigation

noun [ C, U ] us uk /ɪnˌvestɪˈɡeɪʃən/

B2 a process in which officials try to discover all the facts about something, especially a crime or an accident:

Police have begun an investigation into his death.
The cause of the fire is still under investigation (= being investigated).

(Definition von “investigation” aus dem Cambridge Learner's Dictionary © Cambridge University Press)