strengthen/ˋstrɛŋθən; ˈstreŋθ$n/v [I,T] to make something stronger, or to become stronger (使)变强﹔加强﹔使更坚固: an exercise to strengthen your arms 增强臂力的一项练习We may need to strengthen the bridge. 我们可能需要加固这座桥。government measures to strengthen the economy 政府加强经济的措施The euro has strengthened against the dollar. 欧元兑美元上升了。