Matthiessen, Peter Syllabification: (Mat·thies·sen, Peter)Pronunciation: /ˈmaTH(y)əsən/Definition of Matthiessen, Peter (1927-), US writer and environmentalist. Notable works include the novels Far Tortuga (1975) and Killing Mr. Watson (1990) and the travel-based nonfiction The Snow Leopard (1978) and East of Lo Monthang (1995).
