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French défaillir to fail; prefix dé- (Latin de) + faillir. See fail, and compare default.


defail (third-person singular simple present defails, present participle defailing, simple past and past participle defailed)

  1. (obsolete) To cause to fail.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for defail in
Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)