1. A covering (plate or mat) that protects the surface of a table (i.e., from the condensation on a cold glass or bottle)
   "He placed a coaster under his iced tea to prevent water rings on the table"
    
2. A resident of a coastal area
   "As a coaster, she enjoyed daily walks along the beach"
    
3. Someone who coasts
   "He was a coaster in life, always taking the easy way out"
    
4. (nautical) a merchant vessel that stays in coastal waters
   "The coaster transported goods between nearby ports"

Derived forms: coasters

Type of: mover, occupant, occupier, protection, protective cover, protective covering, resident

Encyclopedia: Coaster