noun (n)

• nonparticipation in a dispute or war(noun.act)

  source: wordnet30
• tolerance attributable to a lack of involvement(noun.cognition)

  Synonym:
  disinterest
  

  source: wordnet30
• pH value of 7(noun.attribute)

  source: wordnet30
• The state or quality of being neutral; the condition of being unengaged in contests between others; state of taking no part on either side; indifference.(noun)

  source: webster1913