1. To begin or start a formal inquiry or examination into a matter, typically by authorities or officials
The police decided to launch investigation into the missing person case.
A polícia decidiu iniciar uma investigação sobre o caso da pessoa desaparecida.
2. To formally open an official inquiry, especially by government agencies or law enforcement
The FBI will launch investigation into the financial fraud.
O FBI vai iniciar uma investigação sobre a fraude financeira.