Definition

1. Verb (intransitive):
   • To burn rapidly and violently, typically with intense light and heat, but without producing a detonation or high-pressure shock wave. This describes combustion that is subsonic (slower than the speed of sound).
2. Verb (transitive):
   • To cause a substance to burn in such a rapid, intense manner.

Usage

• Intransitive Verb: The subject (the material) undergoes deflagration.
  • Example: The pile of gunpowder did not explode; it deflagrated in a sudden, fiery flash.
• Transitive Verb: The subject causes an object (the material) to deflagrate.
  • Example: The chemist used a spark to deflagrate the mixture in the controlled experiment.

Examples

• Intransitive Use:
  • The propellant deflagrated predictably, providing thrust to the rocket.
  • In the safety demonstration, they showed how the dust cloud could deflagrate if ignited.
• Transitive Use:
  • The protocol warns not to deflagrate the compound near an open flame.
  • Special equipment is required to safely deflagrate these pyrotechnic materials.

Advanced Usage

• Technical Context: "Deflagrate" is a precise scientific and engineering term, primarily used in chemistry, pyrotechnics, and explosives engineering to distinguish subsonic combustion from a supersonic detonation.
  • Example: A high explosive detonates, while a low explosive like black powder deflagrates.

Variants and Related Words

• Deflagration (noun): The act or process of deflagrating.
  • Example: The deflagration of the fuel-air mixture was contained within the engine cylinder.
• Deflagrator (noun): A historical device for producing a spark or for causing deflagration.
• Deflagrable (adjective): Capable of being deflagrated.

Synonyms

• Burn rapidly
• Combust violently
• Flash burn

Antonyms

• Detonate (to explode with a supersonic shock wave)
• Smolder (to burn slowly without flame)

Related Phrases/Contexts

• "Undergo deflagration": A formal phrase describing the process.
  • Example: The sample was designed to undergo deflagration under specific laboratory conditions.
• "Deflagration to detonation transition (DDT)": A key concept in explosives safety, describing when a deflagration accelerates into a detonation.
  • Example: Preventing deflagration to detonation transition is critical in handling certain energetic materials.

Verb

1. burn with great heat and intense light
   • the powder deflagrated
2. cause to burn rapidly and with great intensity
   • care must be exercised when this substance is to be deflagrated