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English definition of “pillar”

pillar

noun [C] uk   /ˈpɪl.ər/ us    //
a strong column made of stone, metal, or wood that supports part of a building: A row of reinforced concrete pillars supports the bridge.figurative a pillar of smoke/flame pillar of sth a very important member or part of a group, organization, system, etc.: Mrs Maple is a pillar of the local church. Equality is one of the pillars of socialism.
(Definition of pillar from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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