noun (n)

• the act of emitting; causing to flow forth(noun.act)

  Synonym:
  emanation
  

  source: wordnet30
• a substance that is emitted or released(noun.substance)

  Synonym:
  discharge
  

  source: wordnet30
• the release of electrons from parent atoms(noun.process)

  source: wordnet30
• any of several bodily processes by which substances go out of the body(noun.process)

  Synonym:
  discharge, expelling
  

  source: wordnet30
• the occurrence of a flow of water (as from a pipe)(noun.event)

  source: wordnet30
• The act of sending or throwing out; the act of sending forth or putting into circulation; issue; as, the emission of light from the sun; the emission of heat from a fire; the emission of bank notes.(noun)

  source: webster1913