Bunks meaning : One of a series of berths or beds placed in tiers. A built-in bed on board ship, often erected in tiers one above the other. A cot. A wooden case or box, which serves for a seat in the daytime and for a bed at night. A piece of wood placed on a lumberman's sled to sustain the end of heavy timbers. To occupy a bunk. To provide a bunk. To fail to attend school or work without permission; to play truant (usually as in 'to bunk off'). To expel from a school.