Noun

Singular challenge

Plural challenges

challenge (plural challenges)

  1. An instigation or antagonization intended to convince a person to perform an action they otherwise would not.
  2. A difficult task, especially one that the person making the attempt finds more enjoyable because of that difficulty.
  3. (law) A judge's interest in the result of the case for which he or she should not be allowed to sit the case, e.g. a conflict of interest.
    Consanguinity in direct line is a challenge for a judge when he or she is sitting cases.

From Wiktionary under the