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English definition of “proponent”

proponent

noun [C] uk   /prəˈpəʊ.nənt/ us    /-ˈpoʊ-/
a person who speaks publicly in support of a particular idea or plan of action: He is one of the leading proponents of capital punishment.
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Supporters, members and defendersBelievers and non-believers
(Definition of proponent from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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