A portable light produced by the flame of a stick of resinous wood or of a flammable material wound about the end of a stick of wood; a flambeau. Chiefly British A flashlight. Something that serves to illuminate, enlighten, or guide. Slang An arsonist. A portable apparatus that produces a very hot flame by the combustion of gases, used in welding and construction. Slang To cause to burn or undergo combustion, especially with extraordinary rapidity, force, or thoroughness.