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English definition of “security”

security

noun (PROTECTION)    /sɪˈkjʊə.rɪ.ti/ US  /-ˈkjʊr.ə.t̬i/
B1 [U] protection of a person, building, organization, or country against threats such as crime or attacks by foreign countries: The station was closed for two hours because of a security alert. 30 demonstrators were killed in clashes with the security forces over the weekend. The tighter security measures/precautions include video cameras in the city centre. The students were deported because they posed a threat to national security. The proposed national identity card system would help to tighten security against fraud. The most dangerous criminals are held in maximum-security prisons (= prisons that are as difficult as possible to escape from).Protection and protectorsEnvironmental issues [U, + sing/pl verb] the group of people responsible for protecting a building: You'll need to notify security if you want to work late in the office.Protection and protectorsEnvironmental issues
(Definition of security noun (PROTECTION) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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