Similar Words to Expire:
Breathe Out
Buy The Farm
Cash In One's Chips
Choke
Conk
Croak
Decease
Die
Drop Dead
Exhale
Exit
Give-up The Ghost
Go
Kick The Bucket
Pass
Pass Away
Perish
Pop Off
Run Out
Snuff It
Definitions of Expire:
1. Lose validity
2. Pass from physical life and lose all bodily attributes and functions necessary to sustain life
3. Expel air