定约 dìngyuē
(1) [conclude a treaty]∶订约,订立条约或契约
(2) [agree on;appoint;arrange]∶约定,商定
订立契约。 如:「昨天我已经洽建筑公司定约,买了一栋房子。」
英语 to conclude a treaty, to make an agreement, contract (at bridge)