» For other meanings of repertory, please see repertory (disambiguation). Repertory or rep, also called stock in the United States,'s a term used in Western theatre and opera. A repertory theatre can be a theatre in which a resident company presents works from a specified repertoire, usually in alternation or rotation. In the British system, however, it used to be that even quite small towns would support a rep, and the resident company would present a different play every week, either a reviv… (More on Repertory)