1. (noun)narrowness the property of being narrow; having littlewidth "the narrowness of the road"
2. (noun)narrow-mindedness, narrowness an inclination to criticize opposing opinions or shocking behavior
3. (noun)narrowness a restriction of range or scope
"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"
4. (noun)narrow margin, narrowness, slimness a small margin
"the president was not humbled by his narrow margin of victory"; "the landslide he had in the electoral college obscured the narrowness of a victory based on just 43% of the popular vote"