1. A decision made collectively by two or more parties, entities, or individuals acting together
The board reached a joint decision to expand the company.
O conselho chegou a uma decisão conjunta de expandir a empresa.
2. In legal or diplomatic contexts, an official agreement or resolution adopted by multiple parties or governments
The EU member states issued a joint decision on climate policy.
Os estados membros da UE emitiram uma decisão conjunta sobre política climática.