The Collaborative International Dictionary of English v.0.48:

Burning \Burn"ing\, n.
   The act of consuming by fire or heat, or of subjecting to the
   effect of fire or heat; the state of being on fire or
   excessively heated.
   [1913 Webster]

   Burning fluid, any volatile illuminating oil, as the
      lighter petroleums (naphtha, benzine), or oil of
      turpentine (camphine), but esp. a mixture of the latter
      with alcohol.

   Burning glass, a convex lens of considerable size, used for
      producing an intense heat by converging the sun's rays to
      a focus.

   Burning house (Metal.), the furnace in which tin ores are
      calcined, to sublime the sulphur and arsenic from the
      pyrites. --Weale.

   Burning mirror, a concave mirror, or a combination of plane
      mirrors, used for the same purpose as a burning glass.
      [1913 Webster]

   Syn: Combustion; fire; conflagration; flame; blaze.
        [1913 Webster]