expire

UK: /ɪkˈspaɪə^r/ US: /ɪkˈspaɪr/ ,(ik spī^ər′)

Inflections of 'expire' (v): (⇒ conjugate)

expires

v 3rd person singular

expiring

v pres p

expired

v past

expired

v past p

WordReference Random House Learner's Dictionary of American English © 2025

ex•pire /ɪkˈspaɪr/   v., -pired, -pir•ing. 

1. to come to an end;
   terminate:
   [no object] The contract expired at the end of the month.
2. to emit the last breath;
   die:
   [no object] In the novel the hero expired after a long illness.
3. to breathe out (air) from the lungs: [no object]
   still expiring irregularly.
   [~ + object]
   to expire air.

See -spir-.

WordReference Random House Unabridged Dictionary of American English © 2025

ex•pire  (ik spī^ər′), v., -pired, -pir•ing. 
v.i. 

1. to come to an end;
   terminate, as a contract, guarantee, or offer.
2. to emit the last breath;
   die.
3. to breathe out.
4. to die out, as a fire.

v.t. 

5. to breathe out;
   emit (air) from the lungs.
6. [Archaic.] to give off, emit, or eject.

• Latin ex(s)pīrāre to breathe out, equivalent. to ex- ex-¹ + spīrāre to breathe
• late Middle English 1375–1425

ex•pir′er, n. 
ex•pir′ing•ly, adv. 

Collins Concise English Dictionary © HarperCollins Publishers::

expire / ɪkˈspaɪə/ verb

1. (intransitive) to finish or run out; cease; come to an end
2. to breathe out (air); exhale
3. (intransitive) to die

Etymology: 15th Century: from Old French expirer, from Latin exspīrāre to breathe out, from spīrāre to breathe

exˈpirer noun