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Definition of: defy
(di·fī′) v.t. ·fied, ·fy·ing
1. To resist or disregard openly or boldly.
2. To challenge: I defy you to cross this line.
3. To resist successfully; baffle; obstruct: to defy definition.
4. Archaic To invite to combat. See synonyms under OPPOSE.
—noun plural ·fies U.S. Slang A challenge. [<OF defier <Med. L diffidare <dis- not + fidare be faithful <fidus loyal]
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