Etymology

shiplap

S1H4I1P3L1A1P3

Today it means: A type of wooden board that has rabbets to allow them to be overlapped, commonly used for the exterior siding of buildings. Full definition →

First used 19th c.
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The story

From ship + lap.

First known use, by meaning

  • from 19th c. A type of wooden board that has rabbets to allow them to be overlapped, commonly used for the exterior siding of buildings.

Etymology from Wiktionary, CC BY-SA 4.0.