noun (n)

• the trait of behaving in an obscene manner(noun.attribute)

  Synonym:
  bawdiness, lewdness, salaciousness, salacity
  

  source: wordnet30
• an offensive or indecent word or phrase(noun.communication)

  Synonym:
  dirty word, filth, smut, vulgarism
  

  source: wordnet30
• an obscene act(noun.act)

  source: wordnet30
• That quality in words or things which presents what is offensive to chasity or purity of mind; obscene or impure lanquage or acts; moral impurity; lewdness; obsceneness; as, the obscenity of a speech, or a picture.(noun)

  source: webster1913