What is "master class"

n. 1 A class, typically in a performing art such as music or drama, in which a teacher listens to and critiques the performance of individual students, one at a time, while the other students look on. 2 (label en figuratively) An action or series of actions that serve to demonstrate a person's mastery of a subject. 3 A brilliant or virtuosic performance.

n. a class (especially in music) given to talented students by an expert

Master Class is a play by Terrence McNally, with incidental music by Giuseppe Verdi, Giacomo Puccini, and Vincenzo Bellini. The play opened on Broadway in 1995, with stars Zoe Caldwell and Audra McDonald winning Tony Awards.