Middle English overlop (“deck of a single decker”), from Middle Low German overlop (“which leaps overhead”).
orlop (plural orlops)
- (nautical) 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.
- Webster's Seventh New Collegiate Dictionary, Springfield, Massachusetts, G.&C. Merriam Co., 1967
- Page 12 of The Fortune of War, by Patrick O'Brian
- OED 2nd edition 1989
- CorPun - Glossary of Royal Navy terms