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English definition of “challenge”

challenge

noun [C or U] (DIFFICULT JOB)    /ˈtʃæl.ɪndʒ/
B1 (the situation of being faced with) something that needs great mental or physical effort in order to be done successfully and therefore tests a person's ability: Finding a solution to this problem is one of the greatest challenges faced by scientists today. You know me - I like a challenge. It's going to be a difficult job but I'm sure she'll rise to the challenge.Complicated and difficult to doDifficult to understandDifficult situations and unpleasant experiencesAccidents and disasters
(Definition of challenge noun (DIFFICULT JOB) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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