If you finalize something such as a plan or an agreement, you complete the arrangements for it, especially by discussing it with other people.
双语例句
例： Negotiators from the three countries finalized the agreement in August.
三个国家的谈判代表在八月最终敲定了协议。
例： We are saying nothing until all the details have been finalized.
在所有细节最终确定之前我们无可奉告。