wildfire Meaning, Definition & Usage

  1. noun a raging and rapidly spreading conflagration

WordNet

Wild"fire noun
Definitions
  1. A composition of inflammable materials, which, kindled, is very hard to quench; Greek fire.
    Brimstone, pitch, wildfire . . . burn cruelly, and hard to quench. Bacon.
  2. (Med.) (a) An old name for erysipelas. (b) A disease of sheep, attended with inflammation of the skin.
  3. A sort of lightning unaccompanied by thunder. R.

Webster 1913