Definitions
1.verbTo invite (someone) to take part in a competition."We challenged the boys next door to a game of football."
2.verbTo dare (someone).
3.verbTo dispute (something)."to challenge the accuracy of a statement or of a quotation"
4.verbTo make a formal objection to a juror.
5.verbTo claim as due; to demand as a right.
6.verbTo censure; to blame.
7.verbTo question or demand the countersign from (one who attempts to pass the lines)."The sentinel challenged us with "Who goes there?""
8.verbTo object to the reception of the vote of, e.g. on the ground that the person is not qualified as a voter.
9.verbTo take (a final exam) in order to get credit for a course without taking it.
10.adjectiveLacking some physical or mental attribute or skill ; used after adverbs to make politically correct adjectives."mentally challenged"
11.adjectiveUsed following adverbs to make adjectives in imitation of and mocking adjectives of this kind."vertically challenged"