Definitions for orlopˈɔr lɒp
Random House Webster's College Dictionary
(in a ship) the lowermost of four or more decks above the space at the bottom of a hull. Also called or′lop deck`.
Category: Nautical, Navy
Origin of orlop:
1375–1425; late ME overloppe < MD over-loop covering
orlop deck, orlop, fourth deck(noun)
the fourth or lowest deck
The platform over the hold of a ship that makes up the fourth or lowest deck, hence in full called orlop deck, especially of a warship.
Origin: overlop, from overlop.