backbone - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “backbone”

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backbone

noun  us   /ˈbækˌboʊn/

backbone noun (BODY PART)

backbone noun (IMPORTANT PART)

[U] the part of something that provides strength and support: Newcomers are now the backbone of this team.

backbone noun (CHARACTER)

[U] strength of character or bravery: The delegates had enough backbone to reject the proposal.
(Definition of backbone from the Cambridge Academic Content Dictionary © Cambridge University Press)
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