Meaning of the word liner is a material or object used as lining, inner layer, or protective layer inside something else to protect, contain, insulate, waterproof, or improve appearance, or a large passenger ship. As noun, liner has multiple meanings: first, inner protective layer such as bin liner plastic bag lining trash can, pond liner waterproof membrane lining pond, clothing liner inner fabric lining jacket, panty liner absorbent pad, chimney liner lining chimney flue, and drum liner. Second, cosmetic product such as eyeliner and lip liner used to line eyes and lips. Third, ocean liner large passenger ship that sails on regular line or route. In baseball, liner is line drive. Origin comes from line meaning to put line or lining inside. So meaning of liner is something that lines interior, whether waterproof membrane, fabric lining, absorbent pad, cosmetic pencil, or ship traveling regular route, with common theme of something that forms line or inner layer.
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