A precious stone of a carmine red color, sometimes verging to violet, or intermediate between carmine and hyacinth red. It is a red crystallized variety of corundum.
- A deep red, translucent variety of the mineral corundum, highly valued as a precious stone.
- Something, such as a watch bearing, that is made from a ruby.
- A dark or deep red to deep purplish red.
- Of the color ruby.