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English definition of “deficiency”

deficiency

noun [C or U] uk   /dɪˈfɪʃ.ən.si/ us  
C1 a state of not having, or not having enough, of something that is needed: Pregnant women often suffer from iron deficiency. Deficiencies in the education system have been much in the news.
(Definition of deficiency from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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