expiry
/ɪkˈspaɪərɪ/noun
1- the end of the period for which something is valid有效期终止; 满期：
the expiry of the patent
专利证的有效期终止
as modifier an expiry date.到期日（或有效期截止日）。
1.1
- the end of a fixed period of time（一段时间的）结束, 终止：
the expiry of the six-month period.
六个月时间的结束。
1.2
- archaic death〈古〉死亡, 断气。