Meaning & Definition
noun
A small, often circular piece of material used to protect surfaces from hot or cold beverages.
I placed my coffee cup on the coaster to avoid damaging the table.
A ride at an amusement park that involves going up and down steep tracks at high speeds.
The roller coaster at the amusement park is my favorite ride.
A person or thing that coasts, especially a vehicle that glides along a surface.
The old wooden coaster glided silently along the track.
Etymology
From coast + -er, likely referring to one who coasts along.
Common Phrases and Expressions
on a coaster:
travelling or going along easily or without much effort.
coaster ride:
an experience that is full of ups and downs.
Slang Meanings
Someone who benefit without contributing.
He's just a coaster, always using others' resources.
A freeloader who often bums drinks or food.
At parties, he tends to be a coaster, taking advantage of the host's generosity.