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.

British Printing . a 5 1 / 2 -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.

noun

crimson , flushed , gem , jewel , mineral , pinkish , red , rubicund , sanguine , scarlet , stone