make common cause with sb1 formalUNITE to join with other people or groups in order to oppose an enemy （和某人）携手合作；（和某人）协力对敌 U.S. officials expect other Western governments to make common cause with them over the arrests. 美国官员希望其他西方国家的政府能和他们联手捉拿罪犯。
→ have/make common cause (with/against somebody) at cause2(1)
2 formal to join with other people or groups in order to achieve something 〔为达到某种目的〕联合（某人/对付某人） France and Russia made common cause against Britain. 法国和俄国联合起来反对英国。
→ make/find common cause (with/against somebody) at common1(7)