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English definition of “failure”

failure

noun [C or U] (STOP)    /ˈfeɪ.ljər/ US  /-ljɚ/
B2 the fact of something not working, or stopping working as well as it should: He died of heart/liver failure. The accident was caused by the failure of the reactor's cooling system. The number of business failures rose steeply last year. After three crop failures in a row, the people face starvation.Not functioning
(Definition of failure noun (STOP) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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