ruby
nounUK /ˈruːbi/
US /ˈruːbi/
A ruby is a shiny red stone that people use to make jewelry.
She wore a ring with a bright red ruby on her finger.
OTHER MEANINGS
2. A deep red color, like the stone.
The sunset turned the sky a rich ruby red.
3. A programming language used to build websites and apps.
He wrote the program in Ruby.
4. Something very precious or valuable.
Her kindness was a ruby among ordinary days.