Glare means to stare at someone with an angry, fierce expression. When you glare at someone, your eyes narrow and your face shows clear displeasure or hostility. You might glare at a classmate who keeps interrupting your presentation, or notice your teacher glaring at students who won't stop whispering during a test. A glare is different from an ordinary look: it communicates irritation or warning without saying a word.

The word also describes a harsh, blinding light that makes it hard to see. The glare from the sun reflecting off snow can hurt your eyes, which is why skiers wear dark goggles. You might struggle to read your tablet outside because of the glare on the screen, or use your hand to shield your eyes from the glare of oncoming headlights at night.

Both meanings share something in common: intensity that's hard to ignore. Whether it's an angry stare or brilliant light, a glare demands attention and can make people uncomfortable.