noun
A somewhat formal or literary term for a prison or jail. In modern everyday speech, 刑務所 (けいむしょ) or 拘置所 (こうちしょ) are more common.
彼は獄所に送られた。
He was sent to prison.
Compound of 獄 (ごく, 'prison') and 所 (しょ, 'place'). The reading ごくそ is an older, now obsolete form.