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English definition of “ism”

ism

noun [C] uk   /ˈɪz.əm/ informal mainly humorous us  
a set of beliefs, especially ones that you disapprove of: Thatcher is unique among her predecessors in having given the English language a brand new ism, created from her own name.Ideas, concepts and theories
(Definition of ism noun from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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