Definition

Noun: A warning light is a visual signal, typically a flashing or steady illuminated light, designed to alert a person to a potential hazard, malfunction, or dangerous condition. It serves as a cautionary sign of danger.

Usage

A warning light is used to draw immediate attention to a problem or unsafe situation. It is commonly found on vehicle dashboards, industrial machinery, control panels, and in public areas.

Examples

• The car's engine warning light came on, so I pulled over immediately.
• When the warning light on the machine started flashing, the operator shut it down for inspection.
• A red warning light above the door indicates the area is not secure.

Advanced Usage

• "to trigger a warning light": to cause a warning light to activate.
  • Low oil pressure will trigger a warning light on the dashboard.
• "to heed a warning light": to pay attention to and act upon the signal from a warning light.
  • It is important to heed a warning light to prevent further damage.

Variants and Related Words

• Indicator light: A light that shows the status or condition of a system (can be for normal operation or warning).
• Caution light: Often used interchangeably with warning light, especially in industrial contexts.
• Alarm light: A warning light that is part of an audible and visual alarm system.

Synonyms

• Alert light
• Danger signal
• Caution signal

Related Phrases

• Warning signal: A broader term that can include lights, sounds, or other indicators of danger.
• Check engine light: A specific type of automotive warning light.

Related Idioms

• "A red flag": While not specific to lights, this idiom means a warning sign of a problem. A warning light is often a literal "red flag".
  • The strange noise was a red flag, just like a warning light on your dashboard.

Noun

1. a cautionary sign of danger