1. challenge - Noun
2. challenge - Verb
An invitation to engage in a contest or controversy of any kind; a defiance; specifically, a summons to fight a duel; also, the letter or message conveying the summons.
The act of a sentry in halting any one who appears at his post, and demanding the countersign.
A claim or demand.
The opening and crying of hounds at first finding the scent of their game.
An exception to a juror or to a member of a court martial, coupled with a demand that he should be held incompetent to act; the claim of a party that a certain person or persons shall not sit in trial upon him or his cause.
An exception to a person as not legally qualified to vote. The challenge must be made when the ballot is offered.
To call to a contest of any kind; to call to answer; to defy.
To call, invite, or summon to answer for an offense by personal combat.
To claim as due; to demand as a right.
To censure; to blame.
To question or demand the countersign from (one who attempts to pass the lines); as, the sentinel challenged us, with "Who comes there?"
To take exception to; question; as, to challenge the accuracy of a statement or of a quotation.
To object to or take exception to, as to a juror, or member of a court.
To object to the reception of the vote of, as on the ground that the person in not qualified as a voter.
To assert a right; to claim a place.
Source: Webster's dictionaryhis challenge of the assumption that Japan is still our enemy Source: Internet
they reacted irrationally to the challenge of Russian power Source: Internet
The illegal immigrant was challenged by the border guard Source: Internet
Fischer challenged Spassky to a match Source: Internet
She challenged his claims Source: Internet
A 30-day challenge is a short-term commitment that can help jumpstart your long-term goals. Source: Internet