to challenge the power of; resist boldly or openly

to defy parental authority.

to offer effective resistance to

a fort that defies attack.

to challenge (a person) to do something deemed impossible

They defied him to dive off the bridge.

Archaic . to challenge to a combat or contest.

a challenge; a defiance.

verb

give in , obey , surrender , yield

verb

baffle , beard , brave , confront , contemn , dare , defeat , deride , despise , disregard , elude , face , flout , fly in face of , foil , front , gibe * , hang tough * , hurl defiance at , ignore , insult , make my day , mock , oppose , outdare , provoke , repel , repulse , resist , ridicule , scorn , slight , spurn , stick * , stick fast , take one on , thwart , venture , violate , withstand , challenge , break , transgress , frustrate , jeer , scoff