Main Entry: bulk·head

Pronunciation: \ˈbəlk-ˌhed, ˈbəl-ˌked\

Function: noun

Etymology: bulk (structure projecting from a building) + head

Date: 15th century

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