›to officially question whether something is true or legal, or
whether someone has the authority or right to do something: Keep
copies of all written correspondence to support your case if the
company later challenges you for further payment.Corporate
lawyers challenged the ban, but the court upheld it last year.
›to compete against someone or ask them to prove that they can
achieve a particular goal: challenge sb to do sthConsumers are
challenging manufacturers to adopt greener policies. ›to
encourage someone to increase their skills, determination,
abilities, etc. by making them do something new or difficult:
People are just looking for jobs that will challenge and inspire
them. ›to cause difficulties for someone or something: Local
businesses have been greatly challenged by the recession.