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