- a red variety of corundum, used as a gem.
- something made of this stone or one of its imitations, as a bearing in a watch.
- a deep-red port wine.
- deep red; carmine.
- an open-source, high-level programming language that is purely object-oriented.
- a 5½-point type, nearly corresponding in size to American agate.
- ruby-colored: ruby lips.
- containing or set or adorned with a ruby or rubies: a ruby necklace.
- a female given name.
- a deep red transparent precious variety of corundum: occurs naturally in Myanmar and Sri Lanka but is also synthesized. It is used as a gemstone, in lasers, and for bearings and rollers in watchmaking. Formula: Al 2 O 3
- the deep-red colour of a ruby
- (as adjective)
- something resembling, made of, or containing a ruby
- (as modifier)
- denoting a fortieth anniversary
- (formerly) a size of printer's type approximately equal to 5 1/2 point
