to stop fighting and admit defeat

They would rather die than surrender (to the invaders). 他们宁死也不（向侵略者）投降。

If you surrender to an experience or emotion, you stop trying to prevent or control it.

I finally surrendered to temptation, and ate the last piece of chocolate. 我最后还是抵挡不住诱惑，吃掉了剩下的最后一块巧克力。

to give something that is yours to someone else because you have been forced to do so or because it is necessary to do so

The police demanded that the gang surrender their weapons. 警方要求那个团伙交出武器。

Neither side is willing to surrender any territory/any of their claims. 双方都不愿意在领土上／自己的主张上作出任何让步。

the act of stopping fighting and officially admitting defeat

The rebels are on the point of surrender. 叛军很快就要投降了。