co-starTranslate co-star | into French | into German | into Italian | into Spanish Definition of co-star noun a cinema or stage star appearing with another or others of equal importance: she had a well-publicized affair with her co-star verb [no object] appear in a production as a co-star:Rickman co-starred with Bruce Willis in the movie [with object] (of a production) include as a co-star:his new TV show co-stars John Schneiderco-star in other Oxford dictionaries Definition of co-star in the US English dictionary
