traffic light

A2Road Transportation

(common)A device at intersections or crossings with red, yellow, and green lights to control the flow of vehicles and pedestrians.

Example

• The traffic light turned green, so the cars started moving.
• Pedestrians waited for the traffic light to change before crossing the street.

B2Metaphorical Usage

(figurative)A color-coded system using red, yellow, and green to indicate different states or levels of urgency.

Example

• In project management, a traffic light system can help track the progress of tasks.
• The health app uses a traffic light metaphor to show your daily activity levels.

C2Philately

(technical)Colored dots on stamp sheet margins used to check color accuracy in printing.