warning bell

• Expression imagée désignant un signe, un signal ou une sensation qui avertit quelqu'un d'un danger potentiel, d'ennuis ou d'un problème nécessitant de l'attention.

A figurative expression referring to a sign, signal, or feeling that alerts someone to potential danger, trouble, or a problem that requires attention.

1. Signal of dangerB2formal

   A literal or figurative signal that indicates potential danger, trouble, or a problem.

   signal d'alarme

   • The warning bell rang just before the earthquake struck.
   • His sudden silence set off warning bells in her mind.
   • The company's falling profits were a warning bell for investors.

2. Alert or reminderB2informal

   A sign or event that serves as a reminder to be cautious or to take action.

   sonnette d'alarme

   • The teacher's stern look was a warning bell for the noisy students.
   • The deadline approaching was a warning bell to finish the project.
   • Her repeated mistakes were a warning bell that she needed more training.