1. To make something unable to move or be moved; to keep in a fixed position
The doctor immobilized the patient's arm with a cast.
O médico imobilizou o braço do paciente com um gesso.
2. To restrict the movement or action of a person or entity
The security measures immobilized the suspect.
As medidas de segurança imobilizaram o suspeito.
3. In finance, to convert liquid assets into fixed or long-term investments
They decided to immobilize their capital in real estate.
Decidiram imobilizar seu capital em imóveis.