Wiktionary
n. A conception of revolution generally attributed to (w: Louis Auguste Blanqui), which holds that socialist revolution should be carried out by a relatively small group of highly organised and secretive conspirators.
Wikipedia
Blanquism refers to a conception of revolution generally attributed to Louis Auguste Blanqui (1805–1881) which holds that socialist revolution should be carried out by a relatively small group of highly organised and secretive conspirators. Having seized power, the revolutionaries would then use the power of the state to introduce socialism. It is considered a particular sort of 'putschism' – that is, the view that political revolution should take the form of a putsch or coup d'état.
Blanquism is distinguished from other socialist currents (especially Marxist ones) in various ways; on the one hand, contrary to Marx, Blanqui did not believe in the predominant role of the working class, nor did he believe in popular movements. Instead he believed that revolution should be carried out by a small group of professional, dedicated revolutionaries, who would establish a temporary dictatorship by force. This dictatorship would permit the implementation of the basis of a new order, after which power would then be handed to the people. In another respect, Blanqui was more concerned with the revolution itself rather than the future society that would result from it; if his thought was based on precise socialist principles, it rarely goes so far as to imagine a purely socialist society. For Blanquists, the overturning of the bourgeois social order and the revolution are ends sufficient in themselves, at least for their immediate purposes. He was one of the non-Marxist socialists of his day.