1. the end of a period of time during which something is valid or effective
2. the act of breathing out air from the lungs
Usage: medical; technical
3. death
Usage: formal

Examples

• Check the expiration date on the milk before drinking it.
• My driver’s license is approaching its expiration.
• The contract renewal must be completed before expiration.
• The doctor monitored the patient’s inspiration and expiration.
• Deep expiration helps relax the body during meditation.
• The insurance policy lapses after expiration.
• Proper expiration technique is important in yoga breathing exercises.