the Gunpowder PlotˈGunpowder ˌPlot, the a plan by English Catholics led by Guy Fawkes to kill King James I and destroy Parliament by means of explosives on November 5th 1605. The plan failed when one of the Catholics warned a relative not to attend Parliament that day and all the people in the Plot were caught and killed. The event is remembered every November 5th on Guy Fawkes' NIght. → see also Fawkes, Guy