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English definition of “backbone”

backbone

noun (BONES)    /ˈbæk.bəʊn/ US  /-boʊn/
[C] the line of bones down the centre of the back that provides support for the body : She stood with her backbone rigid . → Synonym spineBone structures
(Definition of backbone noun (BONES) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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