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English definition of “ruby”

ruby

noun uk   /ˈruː.bi/ us  
[C or U] a transparent, dark red precious stone, often used in jewellery: a ring with a large ruby a ruby necklace/ring [U] (also ruby red) a dark red colour
ruby
adjective uk   (also ruby red) us  
ruby lips
(Definition of ruby from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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