EXPIRED definition: 1. past simple and past participle of expire 2. If something that lasts for a fixed length of time…. Learn more. expired that is no longer valid that has been breathed out dead The meaning of EXPIRED is dead, deceased —often used as a euphemistic or humorous alternative to dead. How to use expired in a sentence. Simple past tense and past participle of expire. That is no longer valid. That has been breathed out. Dead. He expired on the 29th of November 1872. 英英释义 Adjective 1. having come to an end or become void after passage of a period of time; an expired passport caught driving with an expired license If something — like milk or a free shipping coupon — expires, it is no longer usable or valid. When you expire, you will be dead. The verb expire comes from the Latin expirare, meaning “breathe out,” and the modern use retains that ancient meaning. 1. To come to an end; terminate: My membership in the club has expired. 2. To breathe one's last breath; die: The patient expired early this morning. 3. To exhale; breathe out.