noun
closed ward; locked ward
A psychiatric ward where patients are not free to leave, typically for safety reasons.
彼は急性期の治療のため閉鎖病棟に入院した。
He was admitted to the closed ward for acute treatment.
An open ward where patients can move freely; contrasts with the restricted environment of 閉鎖病棟.
Compound of 閉鎖 (closure) and 病棟 (hospital ward).