noun (n)

• the property of being narrow; having little width(noun.attribute)

  Example:
  The narrowness of the road.
  

  Antonym:
  broadness, wideness
  

  source: wordnet30
• an inclination to criticize opposing opinions or shocking behavior(noun.cognition)

  Synonym:
  narrow-mindedness
  Antonym:
  broad-mindedness
  

  source: wordnet30
• a restriction of range or scope(noun.cognition)

  Example:
  The problem with achievement tests is the narrowness they impose on students.
  The attraction of the book is precisely its narrowness of focus.
  Frustrated by the narrowness of people's horizons.
  

  source: wordnet30
• a small margin(noun.attribute)

  Example:
  The landslide he had in the electoral college obscured the narrowness of a victory based on just 43% of the popular vote.
  

  Synonym:
  narrow margin, slimness
  

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

  source: webster1913