A notification or signal that warns of a situation requiring attention. Used in IT, security, weather, and general contexts.
スマホに地震のアラートが届いた。
An earthquake alert arrived on my smartphone.
システムが異常を検知してアラートを出した。
The system detected an anomaly and issued an alert.
The earthquake alert went off on my smartphone.
The system issues an alert when it detects an error.
It's handy to set up an alert for when stock gets low.
A security alert appeared on the screen.