/klōzd ˈprɪzən/ – Phrase
Definition: nhà tù kín (ở Anh).
A more thorough explanation: A closed prison is a correctional facility where inmates are securely confined and their movements are restricted. In a closed prison, inmates are typically not allowed to leave the facility except under strict supervision, and access to the outside world is limited.
Example: The defendant was sentenced to serve his time in a closed prison due to the nature of his crime.