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From Middle English thonderlyht, equivalent to thunder +‎ light.


thunderlight (plural thunderlights)

  1. (rare, nonstandard) Lightning; a bolt or flash of lightning.
    • 1986, Association for the Development of Earthquake Prediction (Japan), Earthquake prediction research:
      A pillar of fire something like a thunderlight was seen for 30 minutes. No sound was accompanied.
    • 1995, Stephen King, Insomnia:
      This powerful but disquieting thunderlight circled the tiny body with the idiot speed of the atmosphere surrounding a gas giant—Jupiter, say, or Saturn.