combust /kəmˈbʌst/verb 3adjective 2noun 1forms 5 verb3 •To burn, to be consumed by fire; to catch fire.Brom swore after that he spoke only the truth, the truth that as he sat by my side praying for my soul, my body had combusted into flame, the fire rapidly engulfing my entire being. — 2014 •To burn up, to burn away, to consume with fire.But if it be combusted or burnt, it leaveth very much fixed Salt in its own ashes. — 1662 •(figurative) To erupt with enthusiasm or boisterousness.The audience combusts. — 2012 adjective2 •In close conjunction with the sun (so that its astrological influence is "burnt up"), sometimes specified to be within 8 degrees 30'. •(no longer used) Burnt. noun1 •(no longer used) That which undergoes burning. formscombusted · combusting · combusts · more combust · most combust