1. causing worry or fear; disturbing or frightening

Examples

• The alarming rise in temperatures has scientists concerned about climate change.
• She received an alarming phone call from the hospital about her father.
• The alarming number of car accidents on that road prompted the city to install traffic lights.
• His alarming behavior at the meeting made everyone uncomfortable.
• The alarming spread of the disease forced officials to declare a public health emergency.
• It is alarming how quickly misinformation spreads on social media.