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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.
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) < Old French < Old Provençal robi(n) < Medieval Latin rubīnus (lapis) red (stone), derivative of Latin ruber 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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ruby in Technology

1. A relational language designed by Jones and M. Sheeran in 1986 for describing and designing circuits (a hardware description language). Ruby programs denote binary relations and programs are built-up inductively from primitive relations using a pre-defined set of relational operators. Ruby programs also have a geometric interpretation as networks of primitive relations connected by wires, which is important when layout is considered in circuit design.
Ruby has been continually developed since 1986, and has been used to design many different kinds of circuits, including systolic arrays, butterfly networks and arithmetic circuits.
E-mail: .
["Ruby - A Language of Relations and Higher-Order Functions", M. Sheeran, Proc 3rd Banff Workshop on Hardware Verification, Springer 1990].
2. One of five pedagogical languages based on Markov algorithms, used in Higman's report (below). The other languages are Brilliant, Diamond, Nonpareil, and Pearl.
["Nonpareil, a Machine Level Machine Independent Language for the Study of Semantics", B. Higman, ULICS Intl Report No ICSI 170, U London (1968)].
3. A fully object oriented interpreted scripting language by Yukihiro Matsumoto .
Similar in scope to Perl and Python, Ruby has high-level data types, automatic memory management, dynamic typing, a module system, exceptions, and a rich standard library. Other features are CLU-style iterators for loop abstraction, singleton classes/methods and lexical closures.
In Ruby, everything is an object, including the basic data types. For example, the number 1 is an instance of class Fixnum.
Current version (stable): 1.6.7, as of 2002-03-01.
Ruby Home (
Ruby Central (
["Programming Ruby - The Pragmatic Programmer's Guide", David Thomas, Andrew Hunt, Yukihiro Matsumoto pub. Addison Wesley 2000].
The Free On-line Dictionary of Computing, © Denis Howe 2010
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ruby in the Bible

(Heb. peninim), only in plural (Lam. 4:7). The ruby was one of the stones in the high priest's breastplate (Ex. 28:17). A comparison is made between the value of wisdom and rubies (Job 28:18; Prov. 3:15; 8:11). The price of a virtuous woman is said to be "far above rubies" (Prov. 31:10). The exact meaning of the Hebrew word is uncertain. Some render it "red coral;" others, "pearl" or "mother-of-pearl."

Easton's 1897 Bible Dictionary
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