roller ( rollers plural )
1 n-count A roller is a cylinder that turns round in a machine or device.
2 n-count Rollers are hollow tubes that women roll their hair round in order to make it curly.
high-roller ( high-rollers plural ) , high roller High rollers are people who are very rich and who spend money in an extravagant or risky way, especially by gambling. (JOURNALISM) n-count
roller-coaster ( roller-coasters plural ) , rollercoaster
1 n-count A roller-coaster is a small railway at a fair that goes up and down steep slopes fast and that people ride on for pleasure or excitement.
It's great to go on the roller coaster five times and not be sick.
2 n-count If you say that someone or something is on a roller coaster, you mean that they go through many sudden or extreme changes in a short time. (JOURNALISM) usu sing
I've been on an emotional roller-coaster since I've been here...
roller-skate ( roller-skates plural & 3rd person present) ( roller-skating present participle) ( roller-skated past tense & past participle )
1 n-count Roller-skates are shoes with four small wheels on the bottom.
A boy of about ten came up on roller-skates.
2 verb If you roller-skate, you move over a flat surface wearing roller-skates.
On the day of the accident, my son Gary was roller-skating outside our house. V
The craze for roller skating spread throughout the U.S.
Translation English - Cobuild Collins Dictionary
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"Collins Cobuild English Dictionary for Advanced Learners 4th edition published in 2003 © HarperCollins Publishers 1987, 1995, 2001, 2003 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"