Find accurate definitions of over 5,000 Catholic terms and phrases (including abbreviations). Based on Fr. John Hardon's Modern Catholic Dictionary, © Eternal Life. Used with permission.
A truth or fact that should be kept confidential because the obligation not to reveal arises either from the natural law or form the very nature of the case, and its disclosure would cause a grave injury to another. Revealing a serious and shameful secret sin would be the violation of a natural secret. Natural secrets bind under grave sin.