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English definition of “deficiency”

deficiency

noun [C or U]     /dɪˈfɪʃ.ən.si/
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.Scarce, inadequate and not enoughLacking things
(Definition of deficiency noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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