1. a small mat or disk placed under a glass or cup to protect a surface
2. a roller coaster
Usage: informal
3. a ship that sails along a coast from port to port
Usage: nautical

Examples

• She placed her coffee mug on a wooden coaster.
• The glass left a ring on the table because he forgot to use a coaster.
• The kids screamed with excitement on the new coaster at the amusement park.
• That coaster has three loops and reaches speeds of 70 mph.
• The old coaster delivered goods between small coastal towns.
• We bought cork coasters to match our dining room table.