1. in a way that is very obvious or conspicuous; strikingly or blatantly
2. in a way that shines with a bright, harsh light; dazzlingly

Examples

• The error in the report was glaringly obvious to everyone who read it.
• The inequality between the two groups was glaringly apparent.
• The sun reflected glaringly off the snow, making it hard to see.
• His absence from the meeting was glaringly noticeable.
• The contradiction in his statements was glaringly clear.
• The white paint stood out glaringly against the dark wall.