chamber

noun | cham·ber

1. : a judge's office; specifically : the private office where a judge carries on business other than court sessions (as conferences or signing papers) —usually used in pl. four other judges met in my chambers —R. H. Bork a hearing in chambers : the private office where a judge carries on business other than court sessions (as conferences or signing papers) —usually used in pl. four other judges met in my chambers —R. H. Bork a hearing in chambers

2. a : a hall for the meetings of a deliberative, legislative, or judicial body or assembly to run back into the House chamber —Tip O'Neill

   b : a legislative or judicial body : house