v. & n.
v. 1 intr. (usu. foll. by at, upon) look fiercely or fixedly. 2 intr. shine dazzlingly or disagreeably. 3 tr. express (hate, defiance, etc.) by a look. 4 intr. be over-conspicuous or obtrusive.
n. 1 a strong fierce light, esp. sunshine. b oppressive public attention (the glare of fame). 2 a fierce or fixed look (a glare of defiance). 3 tawdry brilliance. glary adj.
[ ME, prob. ult. rel. to GLASS: cf. MDu. and MLG glaren gleam, glare ]