noun (n)

• the act of snoring or producing a snoring sound(noun.act)

  Synonym:
  snore, stertor
  

  source: wordnet30
• The act of respiring through the open mouth so that the currents of inspired and expired air cause a vibration of the uvula and soft palate, thus giving rise to a sound more or less harsh. It is usually unvoluntary, but may be produced voluntarily.(noun)

  source: webster1913