01 n. The science of ideas.
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1.
The science of ideas.
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2.
A theory of the origin of ideas which derives them exclusively from sensation.(Metaph.)
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3.
A set or system of theories and beliefs held by an individual or group, especially about sociopolitical goals and methods to attain them; in common usage, ideology is such a set of beliefs so strongly held by their adherents as to cause them to ignore evidence against such beliefs, and thus fall into error -- in this sense it is viewed as a negative trait; contrasted to pragmatism, and distinct from idealism.