n. 1. One who lines, as, a liner of shoes or clothing. [ 1913 Webster ] 2. An airplane or ship belonging to a transportation company; also, a line-of-battle ship; a ship of the line. [ 1913 Webster ] 3. (Mach.) A thin piece placed between two parts to hold or adjust them, fill a space, etc.; a shim. [ 1913 Webster ] 4. A lining{ 2 }. Specifically: (Steam Engine) A lining within the cylinder, in which the piston works and between which and the outer shell of the cylinder a space is left to form a steam jacket. [ 1913 Webster ] 5. A slab on which small pieces of marble, tile, etc., are fastened for grinding. [ 1913 Webster ] 6. (Baseball) A ball which, when struck, flies through the air in a nearly straight line not far from the ground; also called line drive; as, he hit a sharp liner to right. [ 1913 Webster ] 7. A protective envelope for a phonograph record or other object. [ PJC ] 8. A lining; as, a removable coat liner. [ PJC ] 9. Same as eyeliner. [ PJC ] | 
