Definition of: bulkhead

(bulk′hed′) noun
1. Naut. One of various partitions in a vessel, to separate it into rooms or to divide the hold into watertight compartments.
2. A partition of stone or wood to keep back earth, gas, etc., as in a mine.
3. A horizontal or sloping door outside a house, giving entrance to the cellar.
4. A framework or casing to cover a staircase or elevator shaft.
—bulk′head′ed adjective