Definition of 'on alert'
Example sentences containing 'on alert'
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He said that ports had been put on alert to stop him leaving the country. Times, Sunday Times (2017)City sources say potential buyers have been put on alert. Times, Sunday Times (2017)Hospitals have also been put on alert and doctors have been asked not to schedule surgeries today to keep beds free. The Sun (2017)The world had been put on alert and the world watched with the keenest of eyes. The Sun (2012)The police were put on alert. Times, Sunday Times (2010)Museums and galleries have been placed on alert after a police warning of a specific threat from criminals planning to steal precious objects. Times, Sunday Times (2015)British tourism and farming should be boosted and Government departments have been put on alert for the possibility of a heatwave. The Sun (2009)Top display put Celtic on alert. The Sun (2013)The tourists picked the wrong city in which to leap into a fountain after a string of similar incidents outraged Romans and put police on alert. Times, Sunday Times (2015)And he could get his wish next month, with a host of top clubs on alert as the January transfer window approaches. The Sun (2012)
Definition of on alert from the Collins English Dictionary
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