The term RELINQUISHED, AS TERRITORY can be summarized as the act of giving up control of a certain area or territory. This is often done through a formal agreement between two or more parties, such as a treaty or contract. In this case, the crossword solution is CEDED, which means to give up or surrender something, usually land or rights. This term is often used in international relations and politics when one country gives up control of a certain area to another.