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Related to bulkhead: collision bulkhead
1. any upright wall-like partition in a ship, aircraft, vehicle, etc.
2. a wall or partition built to hold back earth, fire, water, etc.
A horizontal or inclined door over a stairway giving access to a cellar; a structure on the roof of a building covering a water tank, shaft or service equipment.
A wall, partition, or such in a rocket, spacecraft, airplane fuselage, or similar structure, at right angles to the longitudinal axis of the structure and serving to strengthen, divide, or help give shape to the structure.
A tight-seal partition of wood, rock, and mud or concrete in mines that serves to protect against gas, fire, and water.
An upright partition separating compartments in a ship.
1. A structure on the roof of a building covering a water tank, shaft, or service equipment.
2. A structure, as on a roof, covering a stairwell or other opening, to provide adequate headroom.
3. A retaining structure to prevent earth movement into a dredged area.
4. A horizontal or inclined door giving access from the outside of a house to a cellar or to a shaft.
5. The member of an entrance frame which forms a base for a sidelight adjacent to a door.
6. In a concrete form, a partition which blocks fresh concrete from one section of the form or closes the end of the form (as at a construction joint).
i. A fireproof barrier separating the engine into various temperature zones. The cool zone houses the fuel, oil, hydraulic, and electrical components, along with their associated systems. The zones may be maintained at different pressures to prevent the spread of any fire from the hot zone.
ii. Any transverse partition in the fuselage at a right angle to the longitudinal axis to the body, serving to strengthen, divide, or help give shape to the structure. In the process, it divides the body into two parts.