Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • intransitive v. To catch fire; burst into flame: The fire started when a pile of oily rags spontaneously combusted.
  • intransitive v. To undergo combustion; burn: As the fuels were combusting they gave off noxious vapors.
  • intransitive v. To become suddenly angry or agitated: The defendant combusted when he heard the verdict.
  • transitive v. To cause to burn; ignite.
  • transitive v. To cause to become angry or violent: riots that are combusting whole provinces.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. To burn; to catch fire.
  • adj. Burnt.
  • adj. In close conjunction with the sun (so that its astrological influence is "burnt up"), sometimes specified to be within 8 degrees 30'.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Burnt; consumed.
  • adj. So near the sun as to be obscured or eclipsed by his light, as the moon or planets when not more than eight degrees and a half from the sun.

from The Century Dictionary and Cyclopedia

  • Burnt.
  • Hence In astronomy, so near the sun as to be obscured by it, or not more than 8½° from it.
  • To inflame with excitement and agitation.
  • To burn up or consume with fire.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • v. start to burn or burst into flames
  • v. cause to burn or combust
  • v. get very angry and fly into a rage
  • v. cause to become violent or angry
  • v. undergo combustion

Etymologies

Back-formation from combustion.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin combūstus. (Wiktionary)

Examples

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