<p><strong>Noun</strong></p><ul><li>the body of doctrine, myth, belief, etc., that guides an individual, social movement, institution, class, or large group</li><li>such a body of doctrine, myth, etc., with reference to some political and social plan, as that of fascism, along with the devices for putting it into operation</li><li>the study of the nature and origin of ideas</li><li>a system that derives ideas exclusively from sensation</li><li>theorizing of a visionary or impractical nature</li></ul>