verb (used without object), ex·pired, ex·pir·ing.
verb (used with object), ex·pired, ex·pir·ing.
Origin of expire
British Dictionary definitions for unexpiring
Word Origin for expire
Word Origin and History for unexpiring
c.1400, "to die," from Middle French expirer (12c.) "expire, elapse," from Latin expirare/exspirare "breathe out, breathe one's last, die," from ex- "out" (see ex-) + spirare "to breathe" (see spirit). "Die" is the older sense in English; that of "breathe out" is first attested 1580s. Of laws, patents, treaties, etc., mid-15c. Related: Expired; expiring.