1. to bring something to an end in a calm, harmonious manner without conflict or violence
The two nations decided to conclude peacefully their long-standing dispute through negotiations.
As duas nações decidiram concluir pacificamente sua disputa de longa data através de negociações.
2. to finish or end something in a tranquil, agreeable way
We were able to conclude peacefully the meeting with everyone satisfied.
Conseguimos concluir pacificamente a reunião com todos satisfeitos.