Meaning of STAR in English

[adjective] [before noun; not gradable]star quality(figurative) Natalie is, without a doubt, the star (= very best) student in this year's ballet class.(figurative) This afternoon the prosecution will call its star (= most important) witness. [before noun]A star turn is either the main performer in a film, play or other show, or an extremely good performance by someone.

Cambridge English vocab.      Кембриджский английский словарь.