1. （尤指度假时乘坐的）邮轮，客轮
A liner is a large ship in which people travel long distances, especially on holiday.

1. (baseball) a hit that flies straight out from the batter

e.g. the batter hit a liner to the shortstop

Synonym: line drive

2. a large commercial ship (especially one that carries passengers on a regular schedule)

Synonym: ocean liner

3. a piece of cloth that is used as the inside surface of a garment

Synonym: lining

4. a protective covering that protects an inside surface

Synonym: lining