liner (n.)(baseball) a hit that flies straight out from the batter;
the batter hit a liner to the shortstop
Synonyms: line drive
liner (n.)a protective covering that protects an inside surface;
liner (n.)a piece of cloth that is used as the inside surface of a garment;
liner (n.)a large commercial ship (especially one that carries passengers on a regular schedule);
Synonyms: ocean liner