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English definition of “proponent”

proponent

noun [C]     /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 . → Compare opponentSupporters, members and defendersBelievers and non-believers
(Definition of proponent noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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