From WordNet (r) 2.0 (August 2003) [wn]:
propaganda
n : information that is spread for the purpose of promoting some
cause
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Propaganda \Prop`a*gan"da\, n. [Abbrev. fr. L. de propaganda
fide: cf. F. propagande. See Propagate.]
[1913 Webster]
1. (R. C. Ch.)
(a) A congregation of cardinals, established in 1622,
charged with the management of missions.
(b) The college of the Propaganda, instituted by Urban
VIII. (1623-1644) to educate priests for missions in
all parts of the world.
[1913 Webster]
2. Hence, any organization or plan for spreading a particular
doctrine or a system of principles.
[1913 Webster]