coaster

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun One that coasts, as.
• noun One who acts in an aimless manner.
• noun A sled or toboggan.
• noun One who rides a sled or toboggan.
• noun Nautical A vessel engaged in coastal trade.
• noun A roller coaster.
• noun A small mat or plate placed under a vessel to protect a tabletop or other surface beneath.
• noun A small tray, often on wheels, for passing something, such as a wine decanter, around a table.
• noun A resident of a coastal region.

from The Century Dictionary.

• noun A loafer. See coast, v. i., 9.
• noun A name applied to cattle bred on or near the coast.
• noun One who or that which coasts.
• noun A vessel used in this service; a coasting-vessel.
• noun One engaged in the sport of coasting or sledding.
• noun A teamster who draws supplies to lumberers' shanties.
• noun A low round tray, usually of silver, and formerly on wheels, in which a decanter “coasts” or makes the circuit of a dining-table, for the greater convenience of the company.
• noun An inhabitant of or a dweller near the sea-coast.

from the GNU version of the Collaborative International Dictionary of English.

• noun A vessel employed in sailing along a coast, or engaged in the coasting trade.
• noun One who sails near the shore.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Agent noun of coast: one who coasts.
• noun Something that coasts, such as a sled or toboggan.
• noun nautical A merchant vessel that stays in coastal waters.
• noun A person who originates from or inhabits a coastal area.
• noun A small piece of material used to protect the surface of a table, upon which one places cups or mugs.
• noun A small tray on wheels, used to pass something around a table.
• noun computing, slang A worthless compact disc or DVD, such as one that was burned incorrectly.
• noun informal A rollercoaster.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a resident of a coastal area
• noun someone who coasts
• noun a covering (plate or mat) that protects the surface of a table (i.e., from the condensation on a cold glass or bottle)