The Thermidorian Reaction, Revolution of Thermidor, or simply Thermidor refers to the coup of 9 Thermidor (27 July 1794) in which the Committee of Public Safety led by Maximilien Robespierre was sidelined and its leaders arrested and guillotined, resulting in the end of the Reign of Terror.
Consequently, for historians of revolutionary movements, the term Thermidor has come to mean the phase in some revolutions when the political pendulum swings back towards something resembling a pre-revolutionary state, and power slips from the hands of the original revolutionary leadership.