DEFY,

1. To dare to provoke to combat or strife, by appealing to the courage of another to invite one to contest to challenge as, Goliath defied the armies of Israel.
2. To dare to brave to offer to hazard a conflict by manifesting a contempt of opposition, attack or hostile force as, to defy the arguments of an opponent to defy the power of the magistrate.

Were we to abolish the common law, it would rise triumphant above its own ruins, deriding and defying its impotent enemies.

3. To challenge to say or do any thing.

DEFY, n. A challenge.