Refers to the state of being under house arrest or confined, often used in legal, political, or dramatic contexts.
彼は自宅で軟禁状態にある。
He is under house arrest at his home.
軟禁状態が続き、外に出られない。
The confinement continues, and I can't go outside.
Compound of 軟禁 (house arrest) and 状態 (state, condition).