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English definition of “spine”

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spine

noun [C] uk   /spaɪn/ us  

spine noun [C] (BONE)

C1 the line of bones down the centre of the back that provides support for the body and protects the spinal cord : She injured her spine in a riding accident. figurative The Apennine mountains form the spine (= central row of mountains) of Italy.
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spine noun [C] (POINT)

a long, sharp point like a needle growing out of an animal such as a hedgehog or a plant such as a cactus

spine noun [C] (BOOK PART)

the narrow strip where the cover of a book is joined to the pages, usually with the title and writer's name printed on it
(Definition of spine from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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