GNU Collaborative International Dictionary of English

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Found one definition

1.       
   Ideology (?), n. [Ideo- + -logy: cf. F. idéologie.]
   1. The science of ideas.  Stewart.
   
   [1913 Webster]
   
   
   2. (Metaph.) A theory of the origin of ideas which derives them exclusively from sensation.
   
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   ☞ By a double blunder in philosophy and Greek, idéologie . . . has in France become the name peculiarly distinctive of that philosophy of mind which exclusively derives our knowledge from sensation.  Sir W. Hamilton.
   
   
   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.
   
   [PJC]