"slimness" in the noun sense
1. 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"
2. slenderness, slightness, slimness
the property of an attractively thin person
Source: WordNet® (An amazing lexical database of English)
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