Source : Webster's Revised Unabridged Dictionary (1913)

Flambeau \Flam"beau\; n.; pl. {Flambeaux}or {Flambeaus}. [F.,
   fr. OF. flambe flame, for flamble, from L. flammula a little
   flame, dim. of flamma flame. See {Flame}.]
   A flaming torch, esp. one made by combining together a number
   of thick wicks invested with a quick-burning substance
   (anciently, perhaps, wax; in modern times, pitch or the
   like); hence, any torch.

Source : WordNet®

flambeau
     n : a flaming torch (such as are used in processions at night)
     [also: {flambeaux} (pl)]