noun
an important, active or respected person in a particular area of activity :
She's one of the leading lights in the opera world.
noun
an important, active or respected person in a particular area of activity :
She's one of the leading lights in the opera world.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005