If you finalize something such as a plan or an agreement, you complete the arrangements for it, especially by discussing it with other people.
例句
Negotiators from the three countries finalized the agreement in August...8 月里三國談判人員最終敲定了協議。We are saying nothing until all the details have been finalised...在所有細節最后確定下來之前我們無可奉告。