weaken/ˋwikən; ˈwiːkən/v [I,T] 1 to become less powerful or less strong, or to make someone or something do this(使)变弱﹔减弱﹐削弱: The earthquake has weakened several buildings. 这场地震使一些大楼松动了。The president's position has weakened. 总统的地位被削弱了。2 to make someone less determined, or to become less determined (使)动摇〔决心〕: Nothing could weaken her resolve. 什么都不能动摇她的决心。He knew he would weaken. 他知道他会动摇的。