Etymology
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expire (v.)

c. 1400, "to die," from Old French expirer "expire, elapse" (12c.), from Latin expirare/exspirare "breathe out, blow out, exhale; breathe one's last, die," hence, figuratively, "expire, come to an end, cease," from ex "out" (see ex-) + spirare "to breathe" (see spirit (n.)). "Die" is the older sense in English; that of "breathe out" is attested from 1580s. Of laws, patents, treaties, etc., mid-15c. In 17c. also transitive. Related: Expired; expiring.

updated on April 28, 2020

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Definitions of expire from WordNet

expire (v.)
lose validity;
My passports expired last month
Synonyms: run out
expire (v.)
pass from physical life and lose all bodily attributes and functions necessary to sustain life;
Synonyms: die / decease / perish / go / exit / pass away / pass / kick the bucket / cash in one's chips / buy the farm / conk / give-up the ghost / drop dead / pop off / choke / croak / snuff it
expire (v.)
expel air;
Synonyms: exhale / breathe out
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.