homeland security
noun /ˌhəʊmlænd sɪˈkjʊərəti/
/ˌhəʊmlænd sɪˈkjʊrəti/
[uncountable]- (especially in the US) the activities and organizations whose aim is to prevent terrorist attacks
see also the Department of Homeland Security国土安全(美国防止恐怖袭击的行动及机构) Collocations DictionaryHomeland Security is used before these nouns:- secretary