Definition

Noun: 1. The highest state of warning or readiness: A "red alert" is the most urgent level of alert, typically declared when an attack or a serious danger is expected to happen very soon. 2. A state of emergency preparedness: More generally, it can describe any situation of extreme vigilance due to an immediate threat.

Usage

• A "red alert" is declared by authorities (like military, government, or emergency services) to signal that people must take immediate action or precautions.
• It is often used in military, disaster response, and security contexts.
• It functions as a countable noun (e.g., , ).

Examples

• Noun:
  • The military base went on red alert after detecting unidentified aircraft.
  • A red alert was issued for the coastal region due to the approaching hurricane.
  • The hospital is under red alert, meaning all staff must report for duty immediately.

Advanced Usage

• "to be on red alert": To be in a state of maximum readiness or vigilance.
  • The security forces have been on red alert throughout the summit.
• "to sound a red alert": To officially announce or signal the highest level of warning.
  • The sirens sounded a red alert across the city.

Variants and Related Words

• Alert (noun): A warning or state of watchfulness. ("Red alert" is a specific, highest level of alert.)
• State of emergency (noun phrase): An official declaration due to a crisis, which may involve a red alert.

Synonyms

• Highest alert
• Maximum readiness
• Emergency alert
• Critical warning

Idioms and Fixed Phrases

• "Red alert" itself is a fixed phrase used as an idiom meaning a situation of extreme danger or urgency.
  • The discovery of the virus in the community put health officials on red alert.

Noun

1. the highest level of alert when an attack by the enemy seems imminent (or more generally a state of alert resulting from imminent danger)