Main Entry: wild·fire

Pronunciation: \-ˌfī(-ə)r\

Function: noun

Date: 12th century

1 : a sweeping and destructive conflagration especially in a wilderness or a rural area
2 : greek fire
3 : a phosphorescent glow (as ignis fatuus or fox fire)
4 : a destructive leaf-spot disease of tobacco caused by several strains of a bacterium (Pseudomonas syringae)

— like wildfire : very rapidly <the news spread like wildfire>