Ideology n. : The science of ideas.

Ideology n. : A theory of the origin of ideas which derives them exclusively from sensation.

Example:
What political Ideology do aetheists and agnostics belong to?

Taxonomy
ideology, science, everyday society, Political ideologies, history, theory, dominant ideology, definition of ideology, political ideology, critique of ideology, superstructure, Articles with unsourced statements, Analysis of ideology, Ideology and Utopia, free encyclopedia, German Ideology, The Sublime Object of Ideology, Destutt de Tracy.

Defination from the web:
ideology is to offer change in society, and adherence to a set of ideals where conformity already exists, through a normative thought process. ... Implicitly every political tendency entails an ideology whether or not it is propounded as an explicit system of thought. ...