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English definition of “axiom”

axiom

noun [C] uk   /ˈæk.si.əm/ us  
formal a statement or principle that is generally accepted to be true, but need not be so: It is a widely held axiom that governments should not negotiate with terrorists. specialized science a formal statement or principle in mathematics, science, etc., from which other statements can be obtained: Euclid's axioms form the foundation of his system of geometry.
(Definition of axiom from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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