deflagration

/ˌdɛfləˈɡreɪʃən/
noun
  1. A rapid, intense burning process that produces heat and flame, but not a shock wave (unlike an explosion).
    • Engineers studied the deflagration to improve fuel efficiency.
    • The deflagration of the gas cloud lit up the night sky.
    • A controlled deflagration cleared the old building safely.
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