Combustion means "the act of burning," like the combustion of fallen leaves that, if not extinguished immediately, can result in a forest fire.

Combustion derives from the Latin word comburere, which means "to burn up." Matches, kindling, paper, and lighter fluid can be tools for combustion. In chemistry terms, combustion is any process in which a substance combines with oxygen to produce heat and light. Cars run because their engines use combustion to get the cylinders to fire.

Definitions of combustion
  1. noun
    a process in which a substance reacts with oxygen to give heat and light
    synonyms: burning
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    combustion that propagates through a gas or along the surface of an explosive at a rapid rate driven by the transfer of heat
    fire, flame, flaming
    the process of combustion of inflammable materials producing heat and light and (often) smoke
    internal combustion
    the combustion of fuel inside a cylinder (as in an internal-combustion engine)
    blaze, blazing
    a strong flame that burns brightly
    a sudden burst of flame
    the process of initiating combustion or catching fire
    type of:
    oxidation, oxidisation, oxidization
    the process of oxidizing; the addition of oxygen to a compound with a loss of electrons; always occurs accompanied by reduction
  2. noun
    the act of burning something
    synonyms: burning
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    arson, fire-raising, incendiarism
    malicious burning to destroy property
    firing, ignition, inflammation, kindling, lighting
    the act of setting something on fire
    the act of burning something completely; reducing it to ashes
    the incineration of a dead body
    type of:
    change of integrity
    the act of changing the unity or wholeness of something
  3. noun
    a state of violent disturbance and excitement
    combustion grew until revolt was unavoidable”
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    type of:
    garboil, tumult, tumultuousness, uproar, zoo
    a state of commotion and noise and confusion
Word Family

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