Etymology
From Middle English *gloten, glouten, from Old Norse glotta (“to grin, smile scornfully”) or Old English *glotian, both from Proto-Germanic *glutōną (“to stare”), from Proto-Indo-European *gʰel- (“to shine”), related to dialectal Swedish glotta, glutta (“to peep”), Middle High German glutzen, glotzen (“to stare”), Modern German glotzen (“to gawk, goggle”).
Definitions & examples from Wiktionary (CC BY-SA 3.0).