challenge

n 1: a demanding or stimulating situation; "they reacted

irrationally to the challenge of Russian power"

2: a call to engage in a contest or fight

3: questioning a statement and demanding an explanation; "he

challenged the assumption that Japan is our enemy"

4: a formal objection to the selection of a particular person

as a juror

5: a demand by a sentry for a password or identification

v 1: take exception to; "She challenged his claims" [syn: {dispute},

{gainsay}]

2: issue a challenge to; "Fischer challenged Spassky to a

match"

3: ask for identification; "The illegal immigrant was

challenged by the border guard"

4: raise a formal objection in a court of law [syn: {take

exception}]