1. shining with a harsh, bright light
2. very obvious and impossible to ignore, especially when referring to something bad or wrong

Examples

• The glaring sun made it difficult to see the road.
• She shielded her eyes from the glaring headlights.
• There was a glaring error in the report that everyone noticed.
• The glaring inequality in the system needed immediate attention.
• His glaring mistake cost the team the game.
• The glaring white walls hurt my eyes.
• It was a glaring omission not to invite her to the meeting.