noun (n)

• exhaled breath(noun.substance)

  Synonym:
  halitus
  

  source: wordnet30
• the act of expelling air from the lungs(noun.act)

  Synonym:
  breathing out, expiration
  

  source: wordnet30
• The act or process of exhaling, or sending forth in the form of steam or vapor; evaporation.(noun)

  source: webster1913