Gunpowder plot Meaning, Definition & Usage

  1. noun a conspiracy in 1605 in England to blow up James I and the Houses of Parliament to avenge the persecution of Catholics in England; led by Guy Fawkes

WordNet

Definitions
  1. (Eng. Hist.), a plot to destroy the King, Lords, and Commons, in revenge for the penal laws against Catholics. As Guy Fawkes, the agent of the conspirators, was about to fire the mine, which was placed under the House of Lords, he was seized, Nov. 5, 1605. Hence, Nov. 5 is known in England as Guy Fawkes Day.

Webster 1913