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verb (used with or without object), def·la·grat·ed, def·la·grat·ing.
  1. to burn, especially suddenly and violently.

Origin of deflagrate

1720–30; < Latin dēflagrātus (past participle of dēflagrāre to burn down), equivalent to dē- de- + flagr(āre) to burn + -ātus -ate1
Related formsdef·la·gra·ble, adjectivedef·la·gra·bil·i·ty, noundef·la·gra·tion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Historical Examples

British Dictionary definitions for deflagrate


  1. to burn or cause to burn with great heat and light
Derived Formsdeflagration, noun

Word Origin

C18: from Latin dēflagrāre, from de- + flagrāre to burn
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012