The meaning of ALERT is watchful and prompt to meet danger or emergency. How to use alert in a sentence. Synonym Discussion of Alert.

ALERT definition: 1. quick to see, understand, and act in a particular situation: 2. a warning to people to be…. Learn more.

ALERT definition: fully aware and attentive; wide-awake; keen. See examples of alert used in a sentence.

To notify of approaching danger or action; warn: a flashing red light that alerted motorists to trouble ahead. Watchful and prepared for danger, emergency, or opportunity: bird watchers on the alert for a …

If you are alert, you are paying full attention to things around you and are able to deal with anything that might happen. We all have to stay alert. He had been spotted by an alert neighbour.

Dec 7, 2025 · alert (plural alerts) An alarm. A notification of higher importance than an advisory. (military) A state of readiness for potential combat.

Alert, vigilant, watchful imply a wide-awake attitude, as of someone keenly aware of his or her surroundings. Alert describes a ready and prompt attentiveness together with a quick intelligence: …