Meaning

• A confrontation; a dare.

• A difficult task, especially one that the person making the attempt finds more enjoyable because of that difficulty.

• A procedure or action.

• The opening and crying of hounds at first finding the scent of their game.

Meaning

• To invite (someone) to take part in a competition.

  "We challenged the boys next door to a game of football."

• To dare (someone).

• To dispute (something).

  "to challenge the accuracy of a statement or of a quotation"

• To make a formal objection to a juror.

• 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).

  "The sentinel challenged us with "Who goes there?""

• To object to the reception of the vote of, e.g. on the ground that the person is not qualified as a voter.

• To take (a final exam) in order to get credit for a course without taking it.