Meaning

noun a momentary flash of light

noun a spatially localized brightness

verb be shiny, as if wet

origin15th century. Borrowed from Scots glint, from Middle English glenten (“to shine, gleam; flash”), probably from Old Norse *glenta, from Proto-Germanic *glantijaną, causitive of Proto-Germanic *glintaną (“to gleam, shine”), from Proto-Indo-European *ǵʰley- (“to shine”). Cognate with Danish glente, Swedish glänta, Norwegian Nynorsk gletta (“to peep, look”), Middle High German glinzen; compare also…

Etymology from Wiktionary, CC BY-SA 3.0