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English definition of “neologism”

neologism

noun [C]     /niˈɒl.ə.dʒɪ.zəm/ US  /-ˈɑː.lə-/ formal
a new word or expression, or a new meaning for an existing wordTerminology and vocabulary
(Definition of neologism noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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