alert
alertadjective
UK/əˈlɜːt/US/əˈlɝːt/
B2quick to notice and react to things
- Drivers need to stay alert at all times.
- The coffee helped me feel more alert.
alertverb
UK/əˈlɜːt/US/əˈlɝːt/
Dạng từ: alerts · alerted · alerting
C1to warn someone of a danger or problem
- A neighbour alerted the police.
alertnoun
UK/əˈlɜːt/US/əˈlɝːt/
Dạng từ: alerts
C1a warning about a possible danger
- The police issued an alert about the dangerous weather.