1. Plural of dayglow; a bright fluorescent color or material that is highly visible in daylight, especially neon orange or yellow.
Usage: Often used as a modifier (dayglow orange, dayglow vest)

1. Third-person singular present tense of dayglow; to glow or shine brightly with a fluorescent color.
Usage: Informal; less common than the noun form

Examples

• The safety vests were made in dayglows so workers could be seen from far away.
• Her dayglow orange jacket stood out against the gray winter landscape.
• The runner wore dayglow colors during the early morning marathon.
• Dayglow paint is commonly used on construction signs and equipment.
• The fabric dayglows under bright sunlight, making it perfect for visibility gear.