noun

1. A confrontation; a dare.

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

3. A procedure or action.

verb

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

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

2. To dare (someone).

3. To dispute (something).

   “to challenge the accuracy of a statement or of a quotation”

Synonyms: becall, call out