1. A person appointed to maintain communication and cooperation between two or more groups, organizations, or military units
The liaison officer coordinated between the police department and the community center.
O oficial de ligação coordenou entre o departamento de polícia e o centro comunitário.
2. A military officer responsible for ensuring effective communication and cooperation between allied forces or commands
The liaison officer facilitated information exchange between the two military units.
O oficial de ligação facilitou a troca de informações entre as duas unidades militares.