A ruby is a gemstone that's usually a deep red. You can also describe things that are this same red color as ruby, like Dorothy's ruby slippers.

Rubies are one of four types of precious stones — the others are diamonds, emeralds, and sapphires. A ruby can be any reddish shade from pink to dark red, and it's the official birthstone for people born in July. Less expensive rubies are often treated with high heat, which improves the color and clarity of the stone. Ruby comes from the Medieval Latin rubinus lapis, "red stone."

Definitions of ruby
  1. noun
    a transparent piece of ruby that has been cut and polished and is valued as a precious gem
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    type of:
    gem, jewel, precious stone
    a precious or semiprecious stone incorporated into a piece of jewelry
  2. noun
    a transparent deep red variety of corundum; used as a gemstone and in lasers
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    type of:
    corundom, corundum
    very hard mineral used as an abrasive
    transparent gem
    a gemstone having the property of transmitting light without serious diffusion
  3. noun
    a deep and vivid red color
    synonyms: crimson, deep red
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    type of:
    red, redness
    red color or pigment; the chromatic color resembling the hue of blood
  4. adjective
    of a color at the end of the color spectrum (next to orange); resembling the color of blood or cherries or tomatoes or rubies
    synonyms: blood-red, carmine, cerise, cherry, cherry-red, crimson, red, reddish, ruby-red, ruddy, scarlet
    being or having or characterized by hue
Word Family
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