Definitions

1. noun

a person or machine that rolls something, such as a roller coaster or a roller skater

“The roller helped to smooth out the newly laid asphalt.”

2. verb

to roll something

“The wind rolled in from the sea, bringing cool temperatures with it.”

3. noun

a cylindrical piece of equipment used for various tasks, such as rolling out dough or rolling up a document

“The baker used a roller to flatten the yeast dough.”