Wielki słownik angielsko-polski red. nacz D. Jemielniak, M. Miłkowski

(Noun) sport maratończyk, maratonka;

Wordnet angielsko-polski

(someone who participates in long-distance races (especially in marathons) )
maratończyk
synonim: marathon runner
synonim: road runner
synonim: long-distance runner