heat lightning
English Thesaurus
1. bright flashes of light near the horizon without thunder (especially on hot evenings); usually attributed to distant lightning that is reflected by clouds (noun.event)
| hypernym | : | lightning, |
| definition | : | 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 (noun.event) |
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