lapstrake noun 2adjective 1forms 1 noun2 •A style of boatbuilding using overlapping planks. •A boat built in this style. adjective1 •Descriptive of or resembling a boat, or a section of a boat, so constructed.The hotel nightlights shine behind the drawn venetian blinds and the slatted patterns on the curbside cars give them the look of anchored smallcraft with lapstrake hulls. — 1979 formslapstrakes