bulk·head

[buhlk-hed]
noun
1.
Nautical. any of various wall-like constructions inside a vessel, as for forming watertight compartments, subdividing space, or strengthening the structure.
2.
Aeronautics. a transverse partition or reinforcing frame in the body of an airplane.
3.
Civil Engineering.
a.
a partition built in a subterranean passage to prevent the passage of air, water, or mud.
b.
a retaining structure of timber, steel, or reinforced concrete, used for shore protection and in harbor works.
4.
Building Trades.
a.
a horizontal or inclined outside door over a stairway leading to a cellar.
b.
a boxlike structure, as on a roof, covering a stairwell or other opening.

Origin:
1490–1500; bulk2 + head

bulk·head·ed, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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00:10
Bulkhead is always a great word to know.
So is flibbertigibbet. Does it mean:
a chattering or flighty, light-headed person.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
Collins
World English Dictionary
bulkhead (ˈbʌlkˌhɛd) [Click for IPA pronunciation guide]
 
n
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
 
[C15: probably from bulk projecting framework, from Old Norse bálkr partition + head]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

bulkhead
late 15c., perhaps from bulk "framework projecting in the front of a shop" (1580s), which is perhaps from O.N. bolkr "beam, balk" (see balk).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
None of the lower hull forward of the midships bulkhead remains standing.
The bench marks are on the old bridge and on the bulkhead on the north and
  south sides of the old bridge.
Contract to install dolphins and bumper guard system for the protection of the
  existing bulkhead.
Dunnage was used to wedge the bundles against the bulkhead.
Images for bulkhead
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