1. small mats placed under drinks to protect surfaces from moisture or heat
2. roller coasters or similar amusement park rides
Usage: informal
3. ships that sail along a coast for trade
Usage: nautical

Examples

• She placed ceramic coasters on the coffee table before serving drinks.
• The wooden coasters matched the dining room furniture perfectly.
• We rode three different coasters at the amusement park.
• The kids screamed with excitement on the biggest coaster.
• Historic coasters transported goods between coastal towns.
• The cork coasters absorbed condensation from the cold glasses.