1. Question the truth or validity of; take exception to
   "She challenged his claims";
   - dispute, gainsay
    
2. Issue a challenge to
   "Fischer challenged Spassky to a match"
    
3. (law) raise a formal objection in a court of law
   "The lawyer challenged the admissibility of the evidence";
   - take exception
    
4. Push to the limits of capability or endurance
   "The steep climb challengeed even experienced hikers"; "The complex problem challengeed her mathematical skills";
   - tax, strain, test
    
5. Ask for identification
   "The illegal immigrant was challenged by the border guard"

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
   "The champion issued a challenge to all contenders"
    
3. Questioning a statement and demanding an explanation
   "his challenge of the assumption that Japan is still our enemy"
    
4. A formal objection to the selection of a particular person as a juror
   "The defence attorney raised a challenge against the juror with potential bias"
    
5. A demand by a sentry for a password or identification
   "The guard issued a challenge to the approaching vehicle"; "At the checkpoint, travellers must be prepared for a challenge"

Derived forms: challenging, challenged, challenges

Type of: ask for, beef [informal], bespeak, bid, bitch [informal], call for, contend, contest, demand, gripe [informal], invite, kick [informal], object, objection, questioning, repugn [archaic], request, situation, speech act, squawk [informal], state of affairs

Encyclopedia: Challenge