noun: ideas or statements that are often false or exaggerated and that are spread in order to help a cause, a political leader, a government, etc.
Full Definition of PROPAGANDA
1 capitalized : a congregation of the Roman curia having jurisdiction over missionary territories and related institutions
2: the spreading of ideas, information, or rumor for the purpose of helping or injuring an institution, a cause, or a person
3: ideas, facts, or allegations spread deliberately to further one's cause or to damage an opposing cause; also : a public action having such an effect