[1] : The Collaborative International Dictionary of English v.0.48

gatt \gatt\ prop. n. general agreement on tarriffs and trade.
   a united nations agency created by a multinational treaty to
   promote trade by the reduction of tariffs and import quotas.
   acronym

   syn: general agreement on tarriffs and trade.
        wordnet 1.5

[2] : WordNet (r) 2.0

gatt
     n : a united nations agency created by a multinational treaty to
         promote trade by the reduction of tariffs and import
         quotas syn: general agreement on tariffs and trade
see also:
general agreement on tariffs and trade 

Gatt >> G Words
Gatt, definition of term: Gatt
gatt_pag1.html