warning

/ˈwɔːrnɪŋ/
noun
  1. A statement or event that tells someone about possible danger or trouble.
    • His cough was a warning that he was getting sick.
    • The weather service issued a warning about the approaching hurricane.
    • She ignored the warning signs and walked onto the thin ice.
  2. A cautionary message or signal, often official, advising against a certain action.
    • The company received a warning from the health inspector about unsafe conditions.
    • The red light on the dashboard is a warning that the engine is overheating.
    • The teacher gave the student a warning for talking during the test.
adjective
  1. Intended to warn or alert someone of danger or a problem.
    • The warning label on the medicine says not to take it with alcohol.
    • A warning bell rang just before the factory doors closed.
    • The warning signs along the cliff edge are hard to miss.