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I was bored with my job and felt I needed a new challenge.
Are western nations ready to meet the enormous environmental challenges that lie ahead?
We were all keen walkers, and enjoyed the challenge of this remote place.
The challenge for policy-makers is to achieve economic growth without damaging the environment.
The new government faces the daunting challenge of completing the building on time.
He began a legal challenge to clear his name.
There seems to be no significant challenge to the party's free-market ideology.
Recent discoveries pose a serious challenge to accepted views on the age of the universe.
Federer returned to make a major challenge for the Wimbledon title.
One of the men issued the challenge, 'I'll take on any two of you.'
This is the British English definition of challenge. View American English definition of challenge.
someone who studies the stars and planets using scientific equipment including telescopes