Coaster

Noun

 * 1)  one who coasts.
 * 2) Something that coasts, such as a sled or toboggan.
 * 3)  A merchant vessel that stays in coastal waters.
 * 4) A person who originates from or inhabits a coastal area.
 * 5) A small piece of material used to protect the surface of a table, upon which one places cups or mugs.
 * 6) A small tray on wheels, used to pass something around a table.
 * 7)  A worthless compact disc or DVD, such as one that was burned incorrectly.
 * 8)  A rollercoaster.

Coordinate terms

 * saucer