noun (n)

• disgusting wickedness and immorality(noun.state)

  Example:
  He understood the foulness of sin.
  His display of foulness deserved severe punishment.
  Mouths which speak such foulness must be cleansed.
  

  source: wordnet30
• a state characterized by foul or disgusting dirt and refuse(noun.state)

  Synonym:
  filth, filthiness, nastiness
  

  source: wordnet30
• (of weather) the badness of the weather(noun.attribute)

  Example:
  They were wearied with the foulness of the weather.
  

  Synonym:
  raininess
  

  source: wordnet30
• the attribute of having a strong offensive smell(noun.attribute)

  Synonym:
  fetidness, malodorousness, rankness, stinkiness
  

  source: wordnet30
• The quality or condition of being foul.(noun)

  source: webster1913