Definition

Noun: 1. A signal that serves to warn or caution: A perceptible indication, often visual or auditory, that alerts someone to potential danger, a problem, or an undesirable situation. It is designed to prompt attention and a change in behavior to avoid harm.

Usage

• The primary function of a warning signal is to alert and prompt a preventive or evasive response.
• It is typically an automated or standardized sign of impending danger.
• It can be used in both literal contexts (e.g., alarms) and figurative contexts (e.g., early signs of trouble).

Examples

Advanced Usage

• Figurative Use: Used to describe an early sign or indicator of a future problem.
  • The company's declining sales were a clear warning signal to investors.
• In Biology/Zoology: Refers to traits or behaviors in animals that signal danger, such as coloration or sounds.
  • The bright colors of the poison dart frog act as a warning signal to predators.

Variants and Related Words

• Alarm (n): A loud signal of danger.
• Alert (n): A warning of immediate danger.
• Caution (n): Care taken to avoid danger; a warning.
• Siren (n): A device that makes a loud, prolonged sound as a signal or warning.
• Warning light (n): A visual warning signal.

Synonyms

• Alert
• Alarm
• Caution
• Signal
• Beacon

Related Phrases

• Early warning signal: An initial sign that indicates a potential future problem, allowing for early action.
  • An increase in seismic activity is an early warning signal for a possible volcanic eruption.
• To sound a warning signal: To issue a warning.
  • The report sounded a warning signal about the state of the economy.

Notes

• The term is often compound, but as a single lexical unit, it specifically denotes the that conveys a warning. It is distinct from the act of warning.
• In technical and safety contexts, warning signals are often regulated and standardized (e.g., in aviation, maritime, or industrial settings).

Noun

1. an automatic signal (usually a sound) warning of danger