Adjective ruby has 1 sense
  1. red, reddish, ruddy, blood-red, carmine, cerise, cherry, cherry-red, crimson, ruby, ruby-red, scarlet - having any of numerous bright or strong colors reminiscent of the color of blood or cherries or tomatoes or rubies
    Antonym: achromatic (indirect, via chromatic)
,Noun ruby has 3 senses
  1. ruby - a transparent piece of ruby that has been cut and polished and is valued as a precious gem
    --1 is a kind of
    jewel, gem, precious stone
  2. ruby - a transparent deep red variety of corundum; used as a gemstone and in lasers
    --2 is a kind of
    transparent gem; corundom, corundum
  3. crimson, ruby, deep red - a deep and vivid red
    --3 is a kind of red, redness
    Derived form: verb rubify1