Definition of "investigate"

investigate

verb
third-person singular simple present investigates, present participle investigating, simple past and past participle investigated
1. (transitive) To inquire into or study in order to ascertain facts or information.
2. (transitive) To examine, look into, or scrutinize in order to discover something hidden or secret.
3. (intransitive) To conduct an inquiry or examination.
  Quotations
  "Why don't you investigate?" he demanded. And investigate I did.
  1903, Jack London, The Shadow and the Flash