alert
/əˈlɜrt/
warning signal
The fire alarm sounded an alert.
It warned people about the fire.
formal
a signal that warns of danger or a problem
The system issued an alert when the temperature rose above the limit.
It warned that the temperature was too high.
Common in safety, technology, and news contexts.
informal
quick to notice and respond to potential problems
She stayed alert during the night shift.
She remained watchful and ready.
Describes a person’s state of readiness.
Collocations
raise an alertto generate a warning signalissue an alertto formally announce a warning
English Dictionary