'Unkindness' definitions:

Definition of 'unkindness'

From: WordNet
noun
Lack of sympathy [ant: kindness]

Definition of 'Unkindness'

From: GCIDE
  • Unkind \Un*kind"\, a.
  • 1. Not kind; contrary to nature, or the law of kind or kindred; unnatural. [Obs.] "Such unkind abominations." --Chaucer. [1913 Webster]
  • 2. Wanting in kindness, sympathy, benevolence, gratitude, or the like; cruel; harsh; unjust; ungrateful. [1913 Webster]
  • He is unkind that recompenseth not; but he is most unkind that forgetteth. --Sir T. Elyot. [1913 Webster] -- {Un*kind"ly}, adv. -- {Un*kind"ness}, n. [1913 Webster]