Chambers are the private rooms where judges may hear matters, transact business, or have legal discussions with lawyers in private, it is usually used in the plural in this sense. If a trial is “in chambers,” it means that the trial happens in a courtroom without the public, newspaper reporters, etc.
A chamber is also a hall for the meetings of a deliberative, legislative, or judicial body.
Additionally, a chamber is the reception room of a person of rank or authority.
[Last updated in July of 2022 by the Wex Definitions Team]