What does "alert" mean?

Native speaker’s answer
Rebecca
"Alert" means to warn or notify someone of something dangerous, unusual circumstances, or to draw attention to something. The news "alerts" us to what's happening in the world and of potentially dangerous or concerning situations! An "alert," as a noun, is usually a signal or message indicating something concerning or dangerous. Ex: We received an alert for a fire near a house! Ex: The dog's bark alerted us to your arrival.