Signal danger.

Meaning: This means to communicate or indicate a situation or event that is likely to cause harm or injury. It's like saying, Warn others about a potentially harmful situation or event.

Choice of Words: Signal means to communicate or indicate something, especially by means of a prearranged system of signs, flags, or lights. Danger is a situation or event that is likely to cause harm or injury. When put together, 'Signal danger' means to communicate or indicate a situation or event that is likely to cause harm or injury.

Alternative Expressions

Related Expressions

• Barks signal danger.
• Fish signal danger.
• Cross the street at a crosswalk, wait for the signal to turn green.
• Clouds signal weather change.
• The signal turned green.
• These changes can signal a natural disaster.
• Conductor blew whistle to signal.
• Rustling leaves signal autumn's arrival.
• Signal is red.
• Alert signal.