1. To challenge to a contest; to challenge to say or do anything; to dare or brave; to treat with contempt.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• wufy,
• tafy,
• dey,
• dsfa,
• verfy,
• deafs,
• defen,
• nefu,
• defit,
• def,
• deff,
• deby,
• desey,
• defed,
• tehy,
• jify,
• veify,
• safy,
• defea,
• deffo

• deb,
• deep,
• deaf,
• deft,
• debo,
• deny,
• deeb,
• Debi,
• devi,
• Debby,
• DEPP,
• depuy,
• deify.

The adverb form of the word "defy" is "defiantly".

The adjective form of the word "defy" is "defiant".

The plural form of the word "defy" is "defies"

The singular form of the word "defy" is "defiance"