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English definition of “-athon”

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-athon

suffix uk   /-ə.θɒn/ us    /-θɑːn/
added to the end of words referring to an activity or event, especially one that has been organized to raise money for charity, to show that it continues for a long time: a 24-hour dance-athon a walkathon
(Definition of -athon from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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