be warning

Examples (10)

• Let this be a warning to you not to trespass on my land again!
• The accident was a sharp warning to other drivers to slow down.
• His recent failure is a warning of what can happen without preparation.
• The sudden drop in temperature was a warning that a storm was approaching.
• Let that be a warning to anyone who thinks they can break the rules.
• The flashing red light is a warning that the system is overheating.
• The team's unexpected defeat was a timely warning before the finals.
• The strange noise from the engine is a warning that it needs repair.
• The economic crisis was a clear warning to investors about market volatility.
• Let her unfortunate experience be a warning to us all to be more careful.