Noun has 2 senses

• leanness(n = noun.attribute) exiguity, meagerness, meagreness, poorness, scantiness, scantness - the quality of being meager; "an exiguity of cloth that would only allow of miniature capes"


Derived form adjective lean₂, adjective lean₃, adjective lean₄

• leanness(n = noun.attribute) spareness, thinness - the property of having little body fat;


Antonym: fatness
Derived form adjective lean₁