society > travel > travel by water > vessel, ship, or boat > equipment of vessel > masts, rigging, or sails > sail > [noun] > material of sails > piece of canvas strengthening sail > on topsail (2)
top-lining1794
topsail-lining: see quots.; also ‘a platform of thin board nailed upon the upper part of the cross-trees on a vessel's top’ (Smyth).