Definition of bulkhead
1
: an upright partition separating compartments
2
: a structure or partition to resist pressure or to shut off water, fire, or gas
3
: a retaining wall along a waterfront
4
: a projecting framework with a sloping door giving access to a cellar stairway or a shaft
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Merriam-Webster unabridged
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Time Traveler for bulkhead
The first known use of bulkhead was in the 15th century
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