DIFFICULT [C, U]
B1 something that is difficult and that tests someone's ability or determination:
Finding a decision that pleases everyone is the challenge which now faces the committee.
It was the element of challenge which attracted me to the job.
INVITATION [C]
› an invitation to compete in a game or a fight:
I'm sure Paul will race you. He never refuses a challenge.
DISAGREEMENT [C]
› an expression of disagreement with ideas, rules, or someone's authority:
a challenge to the authority of the President
Translations of “challenge”