I. ˈ ̷ ̷ˌ ̷ ̷ noun
Etymology: ship (I) + lap
1.
a.
(1) : wooden sheathing in which the boards are rabbeted so that the lower edge of each board overlaps the upper edge of the next
(2) : boards rabbeted for such sheathing
b. : a shiplapped joint
2. : the lapping of two steel plates (as in the hull plating of a ship)
II. transitive verb
1.
a. : to work (as lumber) to a shiplap pattern
b. : to furnish with shiplap sheathing
the house is shiplapped
2. : to install in the manner of shiplap (as steel plates or planks on the side or deck of a ship)