1 The offices occupied by a barrister or group of barristers. (The term is also used for the group of barristers practising from a set of chambers.)
2 The private office of a judge, master, or district judge. Most interim proceedings are held in chambers (in private) and the public is not admitted, although judgment may be given in open court if the matter is one of public interest.
3 A three-judge panel of the International Court of Justice that may be resorted to as an alternative to the complete 15-member court. Use of the chambers can, for example, be found in the Gulf of Maine Case  ICJ Rep 246.