HIGH-SECURITY


Meaning of HIGH-SECURITY in English

adjective [ only before noun ]

1.

( of buildings and places ) very carefully locked and guarded :

a high-security prison

2.

( of prisoners ) kept in a prison that is very carefully locked and guarded

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.