1. a bright fluorescent color, typically orange, yellow, or green, that is highly visible in daylight
Usage: often used as a trademark for fluorescent materials

1. of or relating to a bright fluorescent color that is highly visible in daylight

Examples

• The safety vest was made in dayglow orange so drivers could see the construction worker from far away.
• She wore a dayglow yellow jacket while jogging at dawn.
• The dayglow paint on the sign made it stand out even in bright sunlight.
• Lifeguards often wear dayglow colors to be easily spotted on the beach.
• The runner's dayglow shoes were visible from across the park.
• Dayglow markers are popular for highlighting important information in textbooks.