1. The property of being narrow; having little width
   "the narrowness of the road"
    
2. A restriction of range or scope
   "frustrated by the narrowness of people's horizons"; "the problem with achievement tests is the narrowness they impose on students"; "the attraction of the book is precisely its narrowness of focus"
    
3. An inclination to criticize opposing opinions or shocking behaviour
   "His narrowness prevented him from understanding different cultural practices";
   - narrow-mindedness
    
4. A small margin
   "the landslide he had in the electoral college obscured the narrowness of a victory based on just 43% of the popular vote";
   - narrow margin, slimness

Type of: breadth, constraint, intolerance, limitation, margin, restriction, width

Antonym: broadness