Definition - Noun [Latin privilegium law affecting a specific person, special right, from privus private + leg-lex law] 1: a right, license, or exemption from duty or liability granted as a special benefit, advantage, or favor: as a: an exemption from liability where an action is deemed to be justifiable (as in the case of self-defense) or because of the requirements of a position or office also : the affirmative defense that an action is privileged compare excuse