Open English Wordnet
Nouns
(n)narrownessa 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”
(n)narrow margin, narrowness, slimnessa 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”