1. A brief, expedited investigation conducted to quickly determine the basic facts of a matter, often used in legal or administrative contexts
The police conducted a summary investigation into the incident.
A polícia realizou uma investigação sumária sobre o incidente.
2. A preliminary inquiry or examination that is less formal and comprehensive than a full investigation
A summary investigation was initiated to assess the validity of the complaint.
Uma investigação sumária foi iniciada para avaliar a validade da reclamação.