/ɪkˈspend ||; ɪkˈspɛnd/verb [T] (formal 正式)expend sth (on sth) to spend or use money, time, care, etc in doing sth 花（钱、时间、心思等）: I have expended a lot of time and energy on that project. 为了那个计划，我花了不少时间和心血。