Merriam-Webster's Collegiate® Dictionary, 11th Edition
GLARE
I. verb (glared; glaring)
Etymology: Middle English glaren; akin to Old English glæs glass
Date: 13th century
intransitive verb
1. to shine with a harsh uncomfortably brilliant light, stand out , obtrude , to stare angrily or fiercely, transitive verb to express (as hostility) by staring angrily, to cause to be sharply reflected,
II. noun
Date: 15th century
1. a harsh uncomfortably bright light , cheap showy brilliance ; garishness, an angry or fierce stare, a surface or sheet of smooth and slippery ice