restricted
v. B2 Upper Intermediate US //ɹiˈstɹɪktəd// UK //ɹɪstɹˈɪktɪd// re·strict·ed
v. limited or kept under control. You use this to describe things that only certain people can use or places where you are not allowed to go freely.
v. limited in extent, number, or scope; kept within specific bounds. Often used to describe areas or information where access is controlled by an authority.
This is a restricted area for staff only.
The doctor put him on a restricted diet to help lower his high blood pressure.
Access to the archives remains strictly restricted to senior researchers due to the fragile nature of the original manuscripts and their historical significance.
Usage
Typically functions as an attributive adjective before a noun or a predicative adjective after a linking verb.