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