bouillabaisse Syllabification: (bouil·la·baisse)Pronunciation: /ˌbo͞o(l)yəˈbās, ˈbo͞o(l)yəˌbās/Definition of bouillabaisse noun a rich, spicy stew or soup made with various kinds of fish, originally from Provence. Origin:French, from modern Provençal bouiabaisso 'boil down'bouillabaisse in other Oxford dictionaries Definition of bouillabaisse in the British & World English dictionary