Origin: Latin suffix -tion
Expiration has 4 different meanings across 1 category:
a coming to an end of a contract period
"the expiry of his driver's license"
the act of expelling air from the lungs
"The doctor listened carefully to my expiration before confirming that my breathing was normal."
The act of expiring.
"The expiration of his passport meant he could no longer travel abroad."
The word expiration comes from the Middle English term for "vapor" or "breath," which was borrowed directly from Latin. It entered modern usage to describe the act of breathing out or coming to an end.