Ideology

1. A set of doctrines or beliefs that are shared by tbe members of a social group or that form tbe basis of a political, economic, or other system.

1. The science of ideas or of mind; a name applied by tbe later disciples of tbe French philosopher Condillac to tbe history and evolution of human ideas, considered as so many successive forms or modes of certain original or transformed sensations; that system of mental philosophy which derives knowledge exclusively from sensation.

1. The science of ideas.

An ideology is a set of beliefs or philosophies attributed to a person or group of persons, especially as held for reasons that are not purely epistemic, in which "practical elements are as prominent as theoretical ones." Formerly applied primarily to economic, political, or religious theories and policies, in a tradition to Plato.