Pronunciation: (trē-est'; It. trē-es'te),[key] —n. 1. a seaport in NE Italy, on the Gulf of Trieste. 237,472.
2. Free Territory of, an area bordering the N Adriatic: originally a part of Italy; designated a free territory by the UN 1947; N zone, including the city of Trieste, 86 sq. mi. (223 sq. km) administered by the U.S. and Great Britain from 1947 until it was turned over to Italy in 1954; S zone 199 sq. mi. (515 sq. km) incorporated into Yugoslavia; now part of Slovenia.
3. Gulf of, an inlet at the N end of the Adriatic, in NE Italy. 20 mi. (32 km) wide.