Definition of fire-slaught in English:

fire-slaught

noun

English Regional, Scottish, Northern
rare
  • Lightning; a flash of lightning.

Origin

Late Middle English; earliest use found in Cursor Mundi: a Northumbrian poem of the 14th century. From fire + slaught.

Pronunciation

fire-slaught

/ˈfʌɪəslɔːt/