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Definition of: expiration
(ek′spə·rā′shən) noun
1. The natural termination of anything, as of a lease or a period of time.
2. The act of breathing out, as air from the lungs: opposed to inspiration.
3. The outbreathing of life; death.
4. That which is expired.
5. The sound made in respiration. See synonyms under END. [<L expiratio, -onis <expirare. See EXPIRE.]
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