v. 〔正式文件〕到期，过期，失效 ≈ run out

v. 〔任期〕届满

• expiration   n. 到期，期满；结束

• The strike comes in light of an unsuccessful 19 months of negotiations after the existing labor contract known as the Interactive Media Agreement expired in late 2014. 协议失效

• But an array of countries are rushing to assert greater influence here, with an eye not just towards the day those protective treaties expire, but also for the strategic and commercial opportunities that already exist. 条约到期

• The demand for energy resources may compel renegotiation of Antarctica's treaties before their expiration. 到期前

• The confusion over food expiration labels. 食物有效期标签

• My driving licence expires in March. 我的驾照3月到期。

• The chairman’s term of office has already expired. 主席任期已满。

BrE /əˌbriːviˈeɪʃn/