(literally) a medieval glove worn with armor, covered in mail or other heavy coating; the gauntlet figures in two idioms: 'run the gauntlet' (to make one's way through an ordeal), and 'the gauntlet was thrown': tossing down the knight's glove was his signal for a challenge being initiated;
e.g. She had to run the gauntlet of young male reporters to reach her office building.