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. DEF Y.

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

A challenge.