WYSS Meaning of WYSS in English Wyss, Jo ‧ hann /waɪs, ˈjəʊhæn $ -hɑːn/ BrE AmE (1743–1818) a Swiss writer best known for his very popular children's book ↑ Swiss Family Robinson Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012