AskDefine | Define exhalation

Dictionary Definition



1 exhaled breath [syn: halitus]
2 the act of expelling air from the lungs [syn: expiration, breathing out]

User Contributed Dictionary




  1. The act or process of exhaling, or sending forth in the form of steam or vapor; evaporation.
  2. That which is exhaled, or which rises in the form of vapor, fume, or steam; effluvium; emanation; as, exhalations from the earth or flowers, decaying matter, etc.
  3. A bright phenomenon; a meteor.


the act or process of exhaling
that which is exhaled

Extensive Definition

Exhalation (or expiration) is the movement of air out of the bronchial tubes, through the airways, to the external environment during breathing.
Exhaled air is rich in carbon dioxide, a waste product of cellular respiration during the production of ATP.
Exhalation has a complementary relationship to inhalation; the cycling between these two efforts define respiration.

External links

exhalation in Hebrew: נשיפה
exhalation in Dutch: Uitademing
exhalation in Polish: Wydech

Synonyms, Antonyms and Related Words

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