/ ˈtʃælɪndʒə(r); NAmE / noun
a person who competes with sb else in sport or in politics for an important position that the other person already holds :
the official challenger for the world championship title
/ ˈtʃælɪndʒə(r); NAmE / noun
a person who competes with sb else in sport or in politics for an important position that the other person already holds :
the official challenger for the world championship title
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005