1. comes to an end; ceases to be valid or effective
2. dies; breathes one’s last breath
Usage: formal; literary
3. breathes out air from the lungs
Usage: medical; technical

Examples

• My driver’s license expires next month.
• The contract expires at the end of the year.
• This coupon expires on December 31st.
• The old king expired peacefully in his sleep.
• Her passport expires in six months.
• The patient expires slowly during the breathing exercise.
• The warranty on this product expires after two years.