GATT Syllabification: (GATT)Pronunciation: /gat/Translate GATT | into German | into Italian Definition of GATT General Agreement on Tariffs and Trade, an international treaty (1948–94) to promote trade and economic development by reducing tariffs and other restrictions. It was superseded by the establishment of the World Trade Organization in 1995. GATT in other Oxford dictionaries Definition of GATT in the British & World English dictionary
