·vt To render impervious to water, as cloth, leather, ·etc.
II. Waterproof ·noun A substance or preparation for rendering cloth, leather, ·etc., impervious to water.
III. Waterproof ·adj Proof against penetration or permeation by water; impervious to water; as, a waterproof garment; a waterproof roof.
IV. Waterproof ·noun Cloth made waterproof, or any article made of such cloth, or of other waterproof material, as rubber; ·esp., an outer garment made of such material.