1. An agreement or understanding between parties that is based on mutual understanding or common practice rather than a formal written contract or explicit statement
There was an unwritten agreement between the neighbors about maintaining the shared fence.
Havia um acordo tácito entre os vizinhos sobre a manutenção da cerca compartilhada.
2. An implicit or understood arrangement that is recognized by all parties involved without being formally documented
The team operated under an unwritten agreement that everyone would contribute equally.
O time funcionava sob um acordo tácito de que todos contribuiriam igualmente.