expiration
UK: ˌɛkspɪˈreɪʃən | US: ˌɛkspəˈreɪʃən
n. the act of breathing out; exhalation
n. the end of a fixed period of time (e.g., a contract or validity period)
n. the emission of air or vapor
The word "expiration" originates from Latin exspirare, combining ex- (out) and spirare (to breathe). The root spir is central to many English words related to breath or spirit (e.g., "respiration," "inspire"). Over time, "expiration" evolved to metaphorically denote the "end" of something (like time or life), mirroring the finality of exhaling breath.
The expiration of his visa forced him to leave the country.
The doctor monitored her expiration during the breathing test.
Check the expiration date on the milk carton before drinking.
The machine records each inhalation and expiration.
The contract’s expiration led to renegotiations.