Final answer:
The definition of propaganda according to Jowett and O'Donnell is the manipulation and employment of language and symbols in the service of an ideological or social purpose.
Step-by-step explanation:
The definition of propaganda according to Jowett and O'Donnell is the manipulation and employment of language and symbols in the service of an ideological or social purpose. Propaganda is not inherently negative, but rather a description of style, function, and political content. It can be used to legitimate a party or leadership, express a vision of a new society, publicize government policy, and mobilize the population to participate in campaigns or eliminate enemies. The term propaganda is often colloquially used in a negative way, but it should not automatically carry negative connotations.