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Related to heat lightning: sheet lightning
Intermittent flashes of light near the horizon, usually seen on a hot summer evening, unaccompanied by thunder and thought to be cloud reflections of distant lightning.
(Physical Geography) flashes of light seen near the horizon, esp on hot evenings: reflections of more distant lightning
lightning too distant for thunder to be heard, observed as diffuse flashes near the horizon on summer evenings.
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|Noun||1.||heat lightning - bright flashes of light near the horizon without thunder (especially on hot evenings); usually attributed to distant lightning that is reflected by clouds|
lightning - the flash of light that accompanies an electric discharge in the atmosphere (or something resembling such a flash); can scintillate for a second or more