vomitorium Syllabification: (vom·i·to·ri·um)Pronunciation: /ˌväməˈtôrēəm/Definition of vomitorium noun (plural vomitoria /-ˈtôrēə/) 1each of a series of entrance or exit passages in an ancient Roman amphitheater or theater. 2a place in which, according to popular misconception, the ancient Romans are supposed to have vomited during feasts to make room for more food. Origin:Latinvomitorium in other Oxford dictionaries Definition of vomitorium in the British & World English dictionary