The Collaborative International Dictionary of English v.0.48:

Judiciary \Ju*di"cia*ry\ (?; 277), a. [L. judiciarius, fr.
   judicium judgment: cf. F. judiciare. See Judicial.]
   Of or pertaining to courts of judicature, or legal tribunals;
   judicial; as, a judiciary proceeding. --Bp. Burnet.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Judiciary \Ju*di"cia*ry\, n. [Cf. LL. judiciaria, F.
   judiciaire.]
   That branch of government in which judicial power is vested;
   the system of courts of justice in a country; the judges,
   taken collectively; as, an independent judiciary; the senate
   committee on the judiciary.
   [1913 Webster]

WordNet (r) 3.0 (2006):

judiciary
    n 1: persons who administer justice [syn: judiciary, bench]
    2: the system of law courts that administer justice and
       constitute the judicial branch of government [syn:
       judiciary, judicature, judicatory, judicial system]