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English definition of “challenge”

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challenge

noun uk   /ˈtʃæl.ɪndʒ/ us  

challenge noun (DIFFICULT JOB)

B1 [C or U] (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.
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challenge noun (INVITATION)

[C] an invitation to compete or take part, especially in a game or argument: "I bet you can't eat all that food on your plate." "Is that a challenge?" [+ to infinitive] She issued a challenge to her rival candidates to take part in a public debate.
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challenge noun (QUESTION)

C2 [C or U] asking if something is true or legal: The result of the vote poses a serious challenge to the government's credibility. Because of the way this research was conducted, its findings are open to challenge.

challenge noun (INSTRUCTION)

[C] an instruction given by a soldier or guard at a border or gate, telling someone to stand still and say their name and reasons for being there

challenge noun (REFUSAL)

[C] specialized law the act of refusing to accept someone as a member of a jury: A challenge to a member of the jury should be made before the trial begins.

challenge

verb [T] uk   /ˈtʃæl.ɪndʒ/ us  

challenge verb [T] (INVITE)

to invite someone to compete or take part, especially in a game or argument: Tina has challenged me to a game of poker
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challenge verb [T] (DOUBT)

B2 to question if something is true or legal: Children challenge their parents' authority far more nowadays than they did in the past.
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challenge verb [T] (TEST)

to test someone's ability or determination

challenge verb [T] (STOP)

to tell someone at a border or gate to stand still and say their name and reasons for being there

challenge verb [T] (REFUSE TO ACCEPT)

specialized law to refuse to accept someone as a member of a jury
(Definition of challenge from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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