These terms refer to a list of plays, operas, or other entertainments which a group or individual is prepared to perform: "The Old Vic Players have a repertoire (or repertory) of more than thirty Shakespearean plays." In this meaning, repertoire is the preferred term. Repertory is the correct word to designate a theatrical company that performs regularly: "To gain experience, she joined a touring repertory company."
Dictionary of problem words and expressions. Harry Shaw. 1975.