- to examine, study, or inquire into systematically; search or examine into the particulars of; examine in detail.
- to search out and examine the particulars of in an attempt to learn the facts about something hidden, unique, or complex, especially in an attempt to find a motive, cause, or culprit: The police are investigating the murder.
- to make inquiry, examination, or investigation.
- to inquire into (a situation or problem, esp a crime or death) thoroughly; examine systematically, esp in order to discover the truth
