Source : Webster's Revised Unabridged Dictionary (1913)

Burning \Burn"ing\, a.
   1. That burns; being on fire; excessively hot; fiery.

   2. Consuming; intense; inflaming; exciting; vehement;
      powerful; as, burning zeal.

            Like a young hound upon a burning scent. --Dryden.

   {Burning bush} (Bot.), an ornamental shrub ({Euonymus
      atropurpureus}), bearing a crimson berry.

Source : WordNet®

burning bush
     n 1: (Old Testament) the bush that burned without being consumed
          and from which God spoke to Moses
     2: deciduous shrub having purple capsules enclosing scarlet
        seeds [syn: {wahoo}, {Euonymus atropurpureus}]
     3: Eurasian perennial herb with white flowers that emit
        flammable vapor in hot weather [syn: {fraxinella}, {dittany},
         {gas plant}, {Dictamnus alba}]
     4: densely branched Eurasian plant; foliage turns purple-red in
        autumn [syn: {summer cypress}, {fire bush}, {fire-bush}, {belvedere},
         {Bassia scoparia}, {Kochia scoparia}]