means Information, especially of a biased or misleading kind, spread deliberately to push a particular political cause or point of view.

from From Latin propaganda, meaning 'things to be propagated or spread' — a grammatical form of propagare, to propagate or graft (the same root that gives us 'propagate' in the garden). The word was plucked from horticulture and handed to the Church: in the 17th century the Catholic Church established the Congregatio de Propaganda Fide, the 'Congregation for Propagating the Faith,' a body charged with spreading missionary work. For a long while 'propaganda' simply meant the spreading of beliefs. Only later — gathering its sinister modern shadow especially through the wartime and political machinery of the 20th century — did it come to mean the deliberate, slanted seeding of ideas in other people's minds.