expiring

(verb) lose validity. Synonyms: run out, expire. Example: "My passports expired last month."

(verb) pass from physical life and lose all bodily attributes and functions necessary to sustain life. Synonyms: die, decease, perish, go, exit, pass away, expire, pass, kick the bucket, cash in one's chips, buy the farm, conk, give-up the ghost, drop dead, pop off, choke, croak, snuff it. Examples: "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."

(verb) expel air. Synonyms: exhale, expire, breathe out. Example: "Exhale when you lift the weight."