1. the quality or state of being glaring; excessive brightness or harshness of light
2. the quality of being strikingly obvious or conspicuous in an unpleasant way

Examples

• The glariness of the midday sun made it difficult to see the screen.
• The glariness of the error in the report was impossible to ignore.
• She wore sunglasses to reduce the glariness reflecting off the water.
• The glariness of his lie became apparent to everyone in the room.
• The photographer adjusted the lighting to minimize glariness in the studio.
• The glariness of the neon signs lit up the entire street.