ruby in WordNet English dictionary

1. of a color at the end of the color spectrum (next to orange); resembling the color of blood or cherries or tomatoes or rubies
   red  reddish  ruddy  blood-red  carmine  cerise  cherry  cherry-red  crimson  ruby  ruby-red  scarlet 
   

1. a deep and vivid red color
   crimson  ruby  deep red 
   
2. a transparent piece of ruby that has been cut and polished and is valued as a precious gem
   ruby 
   
3. a transparent deep red variety of corundum; used as a gemstone and in lasers
   ruby