/ɪkˈspaɪə(r) ||; ɪkˈspaɪr/verb [I] (formal 正式) (used about an official document, agreement, etc) to come to the end of the time when you can use it or in which it has effect （指官方文件、协议等）到期，期满: My passport's expired. I'll have to renew it. 护照到期了，我得换新的护照。 [SYN]A less formal expression is run out. 不大正式的场合用 run out。