ˈRed ˌScare, the BrE AmE
a series of actions by the US government in 1919–20, against people who were believed to be Communists. Many US workers went on ↑ strike (=stopped working to protest about their conditions) and the government was worried that there might be a ↑ revolution . Because of this, many people were arrested and many foreigners were forced to leave the country.