Definition of expire (verb)
- lose validity
- "My passports expired last month"
- synonyms: run out
- pass from physical life and lose all bodily attributes and functions necessary to sustain life
- "She died from cancer"; "The children perished in the fire"; "The patient went peacefully"; "The old guy kicked the bucket at the age of 102"
- synonyms: buy the farm, cash in one's chips, choke, conk, croak, decease, die, drop dead, exit, give-up the ghost, go, kick the bucket, pass, pass away, perish, pop off, snuff it
- antonym: be born
- expel air
Source: Princeton University Wordnet