Meaning of “top-security” in the English Dictionary

british dictionary

"top-security" in British English

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top-securityadjective [ before noun ]

uk /ˌtɒp.sɪˈkjʊə.rə.ti/ us /ˌtɑːp.sɪˈkjʊr.ə.t̬i/

a top-security prison or hospital is very strongly protected because it contains dangerous people

(Definition of “top-security” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)