'Slightness' definitions:

Definition of 'slightness'

From: WordNet
noun
The quality of being unimportant and petty or frivolous [syn: pettiness, triviality, slightness, puniness]
noun
Smallness of stature [syn: delicacy, slightness]
noun
The property of an attractively thin person [syn: slenderness, slightness, slimness]

Definition of 'Slightness'

From: GCIDE
  • Slightness \Slight"ness\, n. The quality or state of being slight; slenderness; feebleness; superficiality; also, formerly, negligence; indifference; disregard. [1913 Webster]