coaster

noun

coast·​er ˈkō-stər 

1

: one that coasts: such as

a

: a person engaged in coastal traffic or commerce

b

: a ship sailing along a coast or engaged in trade between ports of the same country

2

: a resident of a seacoast

3

a

: a tray or decanter stand usually of silver and sometimes on wheels

b

: a shallow container or a plate or mat to protect a surface

4

a

: a small vehicle (such as a sled or wagon) used in coasting

b

: roller coaster

Examples of coaster in a Sentence

Set the glass on a coaster.

Recent Examples on the Web

That way, 1,000 larvae could grow on a tile not much larger than a coaster. —Denise Hruby, Miami Herald, 29 Aug. 2025

Denim Coasters Repurpose your leftover denim into handmade coasters to protect your furniture and add a charming touch to your table. —Elizabeth Fogarty, Better Homes & Gardens, 25 Aug. 2025

Some prefer the classic, potentially more intense feel of wooden coasters, while others enjoy the smooth, versatile and often more thrilling rides offered by steel coasters. —Roger Sands, Forbes.com, 22 Aug. 2025

Canyon Coaster Adventure Park Swoop through mountainside pines for thrills on an alpine coaster — individual carts with sledlike seating. —Roger Naylor, AZCentral.com, 14 Aug. 2025

Word History

First Known Use

1574, in the meaning defined at sense 1

Phrases Containing coaster

• coaster brake
• coaster wagon
• roller coaster

Rhymes for coaster

• poster
• roaster
• toaster
• paternoster

Kids Definition

coaster

noun

coast·​er ˈkō-stər 

1

: one that coasts

especially : a ship engaged in coastal trade

2

a

: a round tray usually of silver and sometimes on wheels

b

: a shallow container or a plate or a mat to protect a surface

3

: a small vehicle (as a sled or wagon) for coasting