<p><strong>Noun</strong></p><ul><li>(plural: rubies) a red variety of corundum, used as a gem.</li><li>something made of this stone or one of its imitations, as a bearing in a watch.</li><li>a deep-red port wine.</li><li>deep red; carmine.</li><li>Ruby, Digital Technology: an open-source, high-level programming language that is purely object-oriented.</li><li>British Printing: a 5½-point type, nearly corresponding in size to American agate.</li></ul><p><strong>Adjective</strong></p><ul><li>ruby-colored: ruby lips.</li><li>containing or set or adorned with a ruby or rubies: a ruby necklace.</li></ul>