Propaganda
Etymology
From Latin propaganda, "things to be propagated," the gerundive of propagare ("to spread, propagate," originally of plant cuttings). The word comes directly from the Congregatio de Propaganda Fide, the Catholic body founded in 1622 to spread the faith through missions. Neutral at first — merely "that which should be disseminated" — it took on its dark modern coloring in the mass-media conflicts of the twentieth century.
noun · /prop-uh-GAN-duh/
Information, often biased or misleading, spread systematically to promote a political cause or point of view.
What it names
It names communication engineered not to inform but to move people toward a conclusion someone else has already chosen.
Example
State television ran the footage on a loop until the propaganda felt less like argument than atmosphere.
Related idea
Ideology is the underlying system of beliefs; propaganda is the machinery built to spread it and suppress rivals. One is the message, the other is the deliberate campaign to make you accept it.