expiration
noun (North American English)(British English expiry)
[uncountable]an ending of the period of time when an official document can be used, or when an agreement is legally acceptable （文件、協議等的）滿期，屆期，到期 the expiration of a fixed-term contract 定期合同的到期 - on expiration
The license can be renewed on expiration. 許可證到期後可以續訂。
Oxford Collocations DictionaryExpiration is used before these nouns:- date
Word Originlate Middle English (denoting a vapour or exhalation): from Latin exspiratio(n-), from the verb exspirare ‘breathe out’, from ex- ‘out’ + spirare ‘breathe’.