CHALLENGE

v. dare, invite to engage in a contest; stimulate, test one's ability; deal with; demand that one identify himself (Military)

n. invitation to engage in a contest, dare; something which tests one's ability, difficult and stimulating task

Challenge is a British digital TV channel owned by Virgin Media Television. Originally known as The Family Channel, and later as Challenge TV, the station relies heavily on gameshows taken from a variety of sources. Most are repeats of programmes acquired from the terrestrial channels' archives, but a few are original productions commissioned by Challenge itself.
See more at Wikipedia.org...

Noun
1. a demanding or stimulating situation; "they reacted irrationally to the challenge of Russian power"
(hypernym) situation, state of affairs
2. a call to engage in a contest or fight
(hypernym) speech act
(hyponym) dare, daring
3. questioning a statement and demanding an explanation; "his challenge of the assumption that Japan is still our enemy"
(hypernym) questioning, inquiring
(derivation) dispute, gainsay
4. a formal objection to the selection of a particular person as a juror
(hypernym) objection
(derivation) take exception
5. a demand by a sentry for a password or identification
(hypernym) demand
Verb
1. take exception to; "She challenged his claims"
(synonym) dispute, gainsay
(hypernym) contest, contend, repugn
(hyponym) call
(entail) question, oppugn, call into question
2. issue a challenge to; "Fischer challenged Spassky to a match"
(hypernym) invite, bid
(hyponym) provoke, stimulate
(derivation) rival, challenger, competitor, competition, contender
3. ask for identification; "The illegal immigrant was challenged by the border guard"
(hypernym) request, bespeak, call for, quest
(entail) stop, halt
4. raise a formal objection in a court of law
(synonym) take exception
(hypernym) object
(hyponym) appeal
(classification) law, jurisprudence

(v. i.)
To assert a right; to claim a place.
  

(n.)
To take exception to; question; as, to challenge the accuracy of a statement or of a quotation.
  

(n.)
To question or demand the countersign from (one who attempts to pass the lines); as, the sentinel challenged us, with "Who comes there?"
  

(n.)
To object to the reception of the vote of, as on the ground that the person in not qualified as a voter.
  

(n.)
To object to or take exception to, as to a juror, or member of a court.
  

(n.)
To claim as due; to demand as a right.
  

(n.)
To censure; to blame.
  

(n.)
To call, invite, or summon to answer for an offense by personal combat.
  

(n.)
To call to a contest of any kind; to call to answer; to defy.
  

(n.)
The opening and crying of hounds at first finding the scent of their game.
  

(n.)
The act of a sentry in halting any one who appears at his post, and demanding the countersign.
  

(n.)
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.
  

(n.)
An exception to a person as not legally qualified to vote. The challenge must be made when the ballot is offered.
  

(n.)
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.
  

(n.)
A claim or demand.
  

Calling another combatant out to combat, a challenge can be à plaisance , friendly, or à la guerre, as in war. The challenge was a frequent device for knights who would call out opponents known to them in war, tournament , or to settle questions of honor . During the 15th century, the challenge became a common feature of the feat of arms , both of the emprise , where such encounters were held with weapons of war, and similar encounters using arms of peace called the pas d'armes .