Source : Webster's Revised Unabridged Dictionary (1913)

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.

Source : WordNet®

Bailey
     n 1: United States singer (1918-1990) [syn: {Pearl Bailey}, {Pearl
          Mae Bailey}]
     2: English lexicographer who was the first to treat etymology
        consistently; his work was used as a reference by Samuel
        Johnson (died in 1742) [syn: {Nathan Bailey}, {Nathaniel
        Bailey}]
     3: the outer courtyard of a castle
     4: the outer defensive wall that surrounds the outer courtyard
        of a castle