- 1alert somebody (to do something) alert somebody (that)… to warn someone about a dangerous or urgent situation Neighbors quickly alerted the police. Alerted by a noise downstairs, he sat up and turned on the light.
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- 2alert somebody to something to make someone aware of something They had been alerted to the possibility of further price rises.
alert
verbNAmE//əˈlərt//
[often passive]Verb Forms present simple I / you / we / they alert he / she / it alerts
past simple alerted
-ing form alerting
Check pronunciation: alert