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English definition of “runner”

runner

noun [C] (GOING QUICKLY)    /ˈrʌn.ər/ US  //
A2 someone who runs, especially in competitions: a long-distance runner → See also runner-upCompetitors and participants in sports and games a horse running in a raceHorse racingHorse riding a person who works for someone by taking messages, collecting money, etc.Messengers and people who deliver things a running shoeShoes and shoemaking
(Definition of runner noun (GOING QUICKLY) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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