Meaning of “challenge” - Learner’s Dictionary

challenge

verb [ T ] uk us /ˈtʃælɪndʒ/
DISAGREE

B2 to express disagreement with ideas, rules, or someone's authority:

The election results are being challenged.
INVITE

to invite someone to compete in a game or fight:

He challenged Smith to a fight.

(Definition of “challenge verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)