noun
: vivid and extensive flashes of electric light without thunder that are seen near the horizon especially at the close of a hot day and are ascribed to far-off lightning reflected by high clouds
noun
: vivid and extensive flashes of electric light without thunder that are seen near the horizon especially at the close of a hot day and are ascribed to far-off lightning reflected by high clouds
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012