An apartment in Eastern houses, furnished with a slightly elevated platform at the upper end and sometimes along the sides, on which were laid mattresses. This was the general arrangement of the public sleeping-room for the males of the family and for guests, but there were usually besides distinct bed-chambers of a more private character (2 Kings 4:10; Exodus 8:3; 2Kings 6:12). In 2 Kings 11:2 this word denotes, as in the margin of the Revised Version, a store-room in which mattresses were kept.
These dictionary topics are from M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition, published by Thomas Nelson, 1897. Public Domain, copy freely.
Easton, Matthew George. "Entry for 'Bed-chamber'". "Easton's Bible Dictionary".