noun (n)

• the absence of matter(noun.state)

  Synonym:
  vacuum
  

  source: wordnet30
• a region that is devoid of matter(noun.location)

  source: wordnet30
• total lack of meaning or ideas(noun.attribute)

  Synonym:
  inanity, mindlessness, pointlessness, senselessness
  

  source: wordnet30
• The quality or state of being vacuous, or not filled; emptiness; vacancy; as, vacuity of mind; vacuity of countenance.(noun)

  source: webster1913