In English, “warning” means a notice or signal that something bad, dangerous, or unpleasant may happen. It can also mean a formal notice telling someone to stop doing something or they may be punished.

Simple meaning

A warning is basically a heads-up about possible danger or trouble. For example, a weather warning tells people to prepare for a storm, and a warning from a teacher or police officer can mean “don’t do that again”.

Common uses

  • Danger alert: “There is a flood warning.”
  • Advice to be careful: “Take this as a warning.”
  • Official notice: “He received a warning for speeding.”

Easy example

“Warning: Hot surface” means the surface may burn you, so be careful.

If you want, I can also explain the difference between warning , caution , and notice.