/kəmˈpli:ʃn ||; kəmˈpliʃən/noun [U] (formal 正式) the act of finishing sth or the state of being finished 完成；完结: You will be paid on completion of the work. 工作一完成就付给你钱。The new motorway is due for completion within two years. 新的高速公路预计在两年内完工。