"An ideology is a set of conscious and unconscious ideas that constitute one's goals, expectations, and actions. An ideology is a comprehensive vision, a way of looking at things (compare worldview) as in several philosophical tendencies (see political ideologies), or a set of ideas proposed by the dominant class of a society to all members of this society (a "received consciousness" or product of socialization).
Ideologies are systems of abstract thought applied to public matters and thus make this concept central to politics. Implicitly every political or economic tendency entails an ideology whether or not it is propounded as an explicit system of thought."
See more..
@Wikipedia