ACT

ACT: A major division in a play. Often, individual acts are divided into smaller units ("scenes") that all take place in a specific location. Originally, Greek plays were not divided into acts. They took place as a single whole interrupted occasionally by the chorus's singing. In Roman times, a five-act structure first appeared based upon Horace's recommendations. This five-act structure became a convention of drama (and especially tragedy) during the Renaissance. (Shakespeare's plays have natural divisions that can be taken as the breaks between acts as well; later editors inserted clear "act" and "scene" markings in these locations.) From about 1650 CE onward, most plays followed the five-act model. In the 1800s, Ibsen and Chekhov favored a four-act play, and in the 1900s, most playwrights preferred a three-act model, though two-act plays are not uncommon.