information, ideas, or rumors deliberately spread widely to help or harm a person, group, movement, institution, nation, etc.

the deliberate spreading of such information, rumors, etc.

the particular doctrines or principles propagated by an organization or movement.

Roman Catholic Church . a committee of cardinals, established in 1622 by Pope Gregory XV, having supervision over foreign missions and the training of priests for these missions. a school ( College of Propaganda ) established by Pope Urban VIII for the education of priests for foreign missions.