definition of
ruby

[1] #1 ruby n. a transparent piece of ruby that has been cut and polished and is valued as a precious gem. wn

[2] #2 ruby s. [red, reddish, ruddy, blood-red, carmine, cerise, cherry, cherry-red, crimson, ruby-red, scarlet] of a color at the end of the color spectrum (next to orange); resembling the color of blood or cherries or tomatoes or rubies. wn

[3] #3 ruby n. a transparent deep red variety of corundum; used as a gemstone and in lasers. wn

[4] #4 ruby n. [crimson, deep red] a deep and vivid red color. wn