also: かく
noun
General term for a demarcated area or quarter within a larger settlement, often historical.
城下町には武家の廓があった。
There was a samurai quarter in the castle town.
noun
enclosure; earthwork enclosure
Specifically refers to an area enclosed by earthen walls or moats, common in Japanese castle architecture.
本丸は城の中心の廓だ。
The honmaru is the central enclosure of the castle.
noun
Historical term for a licensed pleasure quarter, such as Yoshiwara in Edo.
江戸時代、吉原は有名な廓だった。
In the Edo period, Yoshiwara was a famous red-light district.
prefix, suffix
wide and empty
Only when written 廓 · Only with reading かく
Rare prefix or suffix meaning 'wide and empty', used only with the kanji 廓 and reading かく. Found in a few compounds like 廓然.
「廓然」は、かくぜんと読み、広く何もない様子を表す。
廓然 is read かくぜん and describes a wide, empty state.