1. To delay, postpone, or extend the process of reaching a final decision or ending
The team decided to slow down the conclusion of the project to ensure quality.
O time decidiu retardar a conclusão do projeto para garantir qualidade.
2. To deliberately take more time before finalizing or concluding something
We need to slow down the conclusion of the contract negotiations.
Precisamos retardar a conclusão das negociações do contrato.