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A river, about 248 km (154 mi) long, of southern Switzerland and northern Italy flowing generally southward to the Po River. Hannibal defeated the Romans along the banks of the river in 218 bc.
1. (Placename) a canton in S Switzerland: predominantly Italian-speaking and Roman Catholic; mountainous. Capital: Bellinzona. Pop: 314 600 (2002 est). Area: 2810 sq km (1085 sq miles). German name: Tessin
2. (Placename) a river in S central Europe, rising in S central Switzerland and flowing southeast and west to Lake Maggiore, then southeast to the River Po. Length: 248 km (154 miles)