n. 城郭, 外栅

Bailey \Bai"ley\, n. [The same word as bail line of palisades;
cf. LL. ballium bailey, OF. bail, baille, a palisade,
baillier to inclose, shut.]
1. The outer wall of a feudal castle. [Obs.]

2. The space immediately within the outer wall of a castle or
fortress. [Obs.]

3. A prison or court of justice; -- used in certain proper
names; as, the Old Bailey in London; the New Bailey in
Manchester. [Eng.] --Oxf. Gloss.