n.
1.a demanding or stimulating situation
2.a call to engage in a contest or fight
3.questioning a statement and demanding an explanation
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 challenge v.
1.take exception to
2.issue a challenge to
3.ask for identification
4.raise a formal objection in a court of law