Definition of ruby in English:

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Pronunciation: /ˈro͞obē/

noun (plural rubies)

1A precious stone consisting of corundum in color varieties varying from deep crimson or purple to pale rose.
Example sentences
  • Her collection is not much but it includes mica, aquamarine, tourmaline, rubies and rose quartz.
  • And don't miss Ratnapura, where you can not only buy sapphires, rubies, moonstones, aquamarines and the rest, but you can also see where they are mined.
  • Gemstones such as diamonds, emeralds, rubies and sapphires are rarely drilled to make beads as this detracts from their worth.
1.1An intense purplish-red color.
Example sentences
  • Susan likes to cook, so the kitchen is a focal point in the house, with a warm colour scheme of Burmese ruby combined with honey cream to offset the minimalism.
  • After tasting their wine, a smooth, dark ruby Bordeaux blend with a rich berry flavor, I'm convinced they're well on their way.
  • My mum bought me my very own pair of ruby slippers when I was 12 and she used to plait my hair just like Dorothy!
1.2 Printing An old type size equal to 5 1/2 points (smaller than nonpareil and larger than pearl).


Middle English: from Old French rubi, from medieval Latin rubinus, from the base of Latin rubeus 'red'.

  • This is the English form of rubinus, the Latin name of the precious stone. This comes from rubeus ‘red’. This is also the source of rubric (Late Middle English) which goes back to Latin rubrica (terra) ‘red (earth or ochre as writing material)’, from the fact that rubrics were originally written in red ink.

Words that rhyme with ruby

booby, jube, newbie, Newby

For editors and proofreaders

Syllabification: ru·by

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