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[roo-bee] /ˈru bi/
noun, plural rubies.
a red variety of corundum, used as a gem.
something made of this stone or one of its imitations, as a bearing in a watch.
a deep-red port wine.
deep red; carmine.
(initial capital letter) Digital Technology. an open-source, high-level programming language that is purely object-oriented.
British Printing. a 5½-point type, nearly corresponding in size to American agate.
ruby lips.
containing or set or adorned with a ruby or rubies:
a ruby necklace.
Origin of ruby
1275-1325; Middle English rubi (noun) from Old French, from Old Provençal robi(n), from Medieval Latin rubīnus (lapis) “red (stone),” derivative of Latin ruber, rubeus red1
Related forms
rubylike, adjective


[roo-bee] /ˈru bi/
a female given name. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for ruby
Contemporary Examples
Historical Examples
  • But it was very delightful to rush in past ruby and turn somersaults all the way to the kitchen.

    Carnival Compton Mackenzie
  • Two ruby rings she purchased exactly a fortnight before her death.

    In Convent Walls Emily Sarah Holt
  • And the date that Sorrels was alleged to have heard this from ruby?

    Warren Commission (4 of 26): Hearings Vol. IV (of 15) The President's Commission on the Assassination of President Kennedy
  • He was dressed in a ruby velvet dressing-gown, with a cravat with lace ends.

    Caught In The Net Emile Gaboriau
  • But when the physician had thoroughly examined them, he said the ruby he wished for was not amongst them.

    Fairy Tales From all Nations Anthony R. Montalba
British Dictionary definitions for ruby


noun (pl) -bies
a deep red transparent precious variety of corundum: occurs naturally in Myanmar and Sri Lanka but is also synthesized. It is used as a gemstone, in lasers, and for bearings and rollers in watchmaking. Formula: Al2O3
  1. the deep-red colour of a ruby
  2. (as adjective): ruby lips
  1. something resembling, made of, or containing a ruby
  2. (as modifier): ruby necklace
(modifier) denoting a fortieth anniversary: our ruby wedding
(formerly) a size of printer's type approximately equal to 51/2 point
Derived Forms
ruby-like, adjective
Word Origin
C14: from Old French rubi, from Latin rubeus reddish, from ruber red
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for ruby

"clear rich-red variety of corundum," c.1300, from Old French rubi (12c.), from Medieval Latin rubinus lapis "red stone" (cf. Italian rubino), from Latin rubeus "red," related to ruber (see red). As a color name from 1570s. As an adjective from late 15c. Modern French rubis is not explained; Klein suggests a plural mistaken for singular.

Online Etymology Dictionary, © 2010 Douglas Harper
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ruby in Science
A deep-red, translucent variety of the mineral corundum, containing small amounts of chromium and valued as a gem. Compare sapphire.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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