noun
A formal agreement between parties to end conflict or establish peaceful relations.
両国はついに平和協定に調印した。
The two countries finally signed a peace agreement.
停戦協定 is a ceasefire agreement, which is usually a temporary halt to fighting, while 平和協定 is a broader, more permanent peace settlement.
Compound of 平和 (peace) and 協定 (agreement, pact).