Obduracy EncyclopediasEncycl. 1DictionariesDict. 1 ‹ Webster › 2 of 2 Webster’s Revised Unabridged Dictionary · 1913 Ob′du·ra·cy (ŏb′dū·rȧ·sy̆; 277), n. The duality or state of being obdurate; invincible hardness of heart; obstinacy. "Obduracy and persistency." Shak. The absolute completion of sin in final obduracy. South. Choose resources