Entry 3 senses · 2 variants Webster, 1913 Unkind /ən-kīnd'/ · Un·kind · IPA /ʌnˈkaɪnd/ a. a. 01 a. Having no race or kindred; childless. 1. Having no race or kindred; childless.[Obs. & R.] 02 a. Not kind; contrary to nature, or the law of kind or kindred; unnatural. 1. Not kind; contrary to nature, or the law of kind or kindred; unnatural.[Obs.] 2. Wanting in kindness, sympathy, benevolence, gratitude, or the like; cruel; harsh; unjust; ungrateful. “He is unkind that recompenseth not; but he is most unkind that forgetteth.” — Sir T. Elyot.