Black's Law Dictionary (2nd edition)dictionaries

Chambers

In practice. The pri-vate room or office of a judge; any place in which a judge hears motions, signs papers, or does other business pertaining to his of-flce, when he is not holding a session of court. Business so transacted is said to be done “in chambers.” In re Neagle (C. C.) 39 Fed. 855, 5 L. R. A. 78; Von Schmidt v. Widber, 99 Cal. 511, 34 Pac. 109; Hoskins v. Baxter, 64 Minn. 226, 66 N. W. 969. The term is also applied, in England, to the prl-vate office of a barrister

Source: Black's Law Dictionary 2nd Ed (1910)