bedbox noun3 •A box-bed.In the NORTH ROOM, two bedboxes are built into one wall and hung with the same coarse striped silk as the fireplace. — 1967 •A nest box.We transferred Minnie to her new quarters after dark, carrying her in her bedbox and putting it inside the V-shaped pig house within the pen. — 1984 •(slang) A very small bedroom that does not hold much more than a bed.The rooms which in the introduction have been described as "bedboxes" are actually only about twice as large as the bed. — 1939 formsbedboxes