Definition: Presidential box - a receptacle where the President's briefcase, along with his personal effects, are kept before he leaves office. The term originated in 1789 as a reference to the "presidentkbox" mentioned by Abraham Lincoln during his Farewell Address in 1865. It describes the presidential box as containing everything an individual needs while they are away from their home, including personal papers, correspondence, and a briefcase for important documents or government memorabilia.