Definition

1. Noun:
   • The process of burning: A chemical process where a substance reacts rapidly with oxygen, producing heat and light (fire).
   • The act of burning something: The action of setting something on fire or causing it to burn.
   • (Technical) A rapid chemical reaction: A high-temperature exothermic redox reaction between a fuel and an oxidant, usually atmospheric oxygen.
   • (Figurative) A state of violent excitement or agitation: A state resembling the intensity and chaos of a fire, often used metaphorically.

Usage and Examples

• Describing a chemical process:
  • The combustion of fossil fuels releases carbon dioxide.
  • Internal combustion engines power most cars.
• Describing the act of burning:
  • The combustion of the waste must be controlled.
  • The spontaneous combustion of the oily rags caused the fire.
• Used figuratively:
  • The political debate was a combustion of opposing ideologies.
  • Her speech ignited a combustion of emotions in the crowd.

Advanced Usage

• "Spontaneous combustion": Ignition of a substance (like oily rags or coal) without an external flame, caused by a slow internal oxidation process that generates enough heat to start a fire.
  • The fire marshal attributed the blaze to spontaneous combustion.
• "Internal combustion engine": An engine where fuel is burned within the engine itself (in cylinders), creating pressure that moves pistons.
  • He is an expert in internal combustion engine design.
• "Rapid combustion": Burning that happens quickly, often with a flame.
  • Gasoline is known for its rapid combustion.

Variants and Related Words

• Combust (verb): To catch fire and burn.
  • The material will combust at high temperatures.
• Combustible (adjective): Capable of catching fire and burning easily.
  • Gasoline is a highly combustible liquid.
• Combustibility (noun): The quality of being combustible.
  • The combustibility of the new material is being tested.
• Combustion chamber (noun phrase): The part of an engine where fuel is burned.
  • The fuel mixes with air in the combustion chamber.

Synonyms

• Burning: The process of undergoing combustion.
• Incinerating: Burning something completely to ashes.
• Oxidation: A broader chemical term for a reaction with oxygen; combustion is a rapid, energetic form of oxidation.
• Conflagration: A large, destructive fire (implies a large-scale event).

Antonyms

• Extinguishing: The act of putting out a fire.
• Quenching: Suppressing or stifling, as in quenching a fire or a reaction.
• Inertness: A state of being chemically inactive or non-reactive.

Related Phrases and Technical Terms

• "Heat of combustion": The amount of heat released when a substance undergoes complete combustion.
  • Scientists measured the heat of combustion for the new biofuel.
• "Complete combustion": Burning that uses a sufficient supply of oxygen, producing carbon dioxide and water as typical products.
  • A blue flame often indicates more complete combustion.
• "Incomplete combustion": Burning with an insufficient oxygen supply, producing soot (carbon) and carbon monoxide.
  • The smoky flame was a sign of incomplete combustion.

Noun

1. the act of burning something
   • the burning of leaves was prohibited by a town ordinance
2. a state of violent disturbance and excitement
   • combustion grew until revolt was unavoidable
3. a process in which a substance reacts with oxygen to give heat and light