Grand Guignol Syllabification: (Grand Gui·gnol)Pronunciation: /gräN gēnˈyôl/Definition of Grand Guignol noun a dramatic entertainment of a sensational or horrific nature, originally a sequence of short pieces as performed at the Grand Guignol theater in Paris. Origin:French, literally 'Great Punch'Grand Guignol in other Oxford dictionaries Definition of Grand Guignol in the British & World English dictionary