master class

Meanings

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 observe.
2. An action or series of actions that serve to demonstrate a person's mastery of a subject.
3. A brilliant or virtuosic performance.

Etymology

From master + class. First use appears c. 1861 in the publications of John Stuart Mill.