From the verb expire: (⇒ conjugate)
expired is: Click the infinitive to see all available inflections
v pastverb, past simple: Past tense--for example, "He saw the man." "She laughed."
v past pverb, past participle: Verb form used descriptively or to form verbs--for example, "the locked door," "The door has been locked."

WordReference Random House Learner's Dictionary of American English © 2020
ex•pire /ɪkˈspaɪr/USA pronunciation   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 © 2020
ex•pire  (ik spīər),USA pronunciation v.,  -pired, -pir•ing. 
  1. to come to an end;
    terminate, as a contract, guarantee, or offer.
  2. to emit the last breath;
  3. to breathe out.
  4. to die out, as a fire.

  1. to breathe out;
    emit (air) from the lungs.
  2. [Archaic.]to give off, emit, or eject.
ex•pirer, n. 
ex•piring•ly, adv. 
  • Latin ex(s)pīrāre to breathe out, equivalent. to ex- ex-1 + spīrāre to breathe
  • late Middle English 1375–1425

Collins Concise English Dictionary © HarperCollins Publishers::
expire /ɪkˈspaɪə/ vb
  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 n
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