[coast.er] n (1574) 1: one that coasts: as a: a person engaged in coastal traffic or commerce b: a ship sailing along a coast or engaged in trade between ports of the same country
2: a resident of a seacoast 3 a: a tray or decanter stand usu. of silver and sometimes on wheels b: a shallow container or a plate or mat to protect a surface
4. a: a small vehicle (as a sled or wagon) used in coasting b: roller coaster