Having little size, compared with other things of the same kind; little in quantity or degree; diminutive; not large or extended in dimension; not great; not much; inconsiderable; as, a small man; a small river.(adjective)
source: webster1913
noun (n)
the slender part of the back(noun.body)
source: wordnet30
a garment size for a small person(noun.attribute)
source: wordnet30
The small or slender part of a thing; as, the small of the leg or of the back.(noun)