1. A decision made together by two or more people or groups, with shared responsibility and agreement
The couple made a joint decision to relocate to another city.
O casal tomou uma decisão conjunta de se mudar para outra cidade.
2. A formal agreement or determination reached through collective deliberation
The board reached a joint decision to invest in new technology.
O conselho chegou a uma decisão conjunta de investir em nova tecnologia.