A monopolylogue is a form of entertainment in which one actor plays many characters . Pioneered by English actor Charles Mathews, the genre has been revived in the late 20th and early 21st century. ... Found on http://en.wikipedia.org/wiki/Monopolylogue
Mon`o·pol'y·logue noun [ Mono- + Greek poly`s many + lo`gos speech.] An exhibition in which an actor sustains many characters. Found on http://www.encyclo.co.uk/webster/M/96