expire

ex·pire

verb
\ik-ˈspī(ə)r, usually for intransitive verb 2 and transitive verb ek-\

ex·piredex·pir·ing

Definition of EXPIRE

intransitive verb

1

: to breathe one's last breath : die

2

: to emit the breath

transitive verb

: to breathe out from or as if from the lungs <the basal metabolism test…measures the amount of carbon dioxide expired by the lungs—J. D. Ratcliff>