Definition

1. Noun:
   • A caution signal: A yellow light is a traffic signal that warns drivers to prepare to stop because the signal is about to turn red. It indicates that one should proceed with caution if it is not safe to stop.
   • A warning or signal to be careful: In a broader, metaphorical sense, a yellow light can represent any indication that one should slow down or proceed carefully in a situation.

Usage Examples

• Noun:
  • The driver sped up when he saw the yellow light. (The driver increased his speed upon seeing the caution signal.)
  • The committee's report gave a yellow light to the project, suggesting more research was needed. (The report acted as a warning, indicating the project should proceed carefully.)

Advanced Usage

• "to get/have a yellow light": to receive permission or an indication to proceed cautiously.

  • The team got a yellow light from management to explore the new idea. (Management gave the team cautious approval to investigate the new idea.)

• "a yellow light situation": a circumstance that requires careful, hesitant action.

  • Merging the two departments is a yellow light situation; we must move slowly. (The merger is a situation demanding cautious progress.)

Variants and Related Words

• Green light (n): a signal to proceed or permission to begin.
  • We got the green light to start construction.
• Red light (n): a signal to stop or a command to halt an activity.
  • The budget cuts are a red light for new hiring.

Synonyms

• Caution signal: A sign warning of potential danger.
• Warning: An indication of possible problems ahead.

Related Phrases

• Proceed with caution: The instruction directly associated with a yellow traffic light; to move forward carefully.
  • The email from legal told us to proceed with caution on the contract.
• Yellow flag: A symbol used in racing to indicate caution on the track; similar in metaphorical use.
  • The economic data is a yellow flag for investors. (The data is a warning sign for investors.)

Related Idioms

• See yellow: This is not a standard idiom for the traffic signal. The common idiom is to run a yellow light, meaning to drive through an intersection when the traffic signal is yellow.
  • He decided to run the yellow light and made it through the intersection.

Noun

1. the signal to proceed with caution