Trans-Alaska Pipeline Syllabification: (Trans-A·las·ka Pipe·line)Pronunciation: /ˌtranzəˈlaskə/Entry from US DictionaryDefinition of Trans-Alaska Pipeline an oil pipeline that extends for 800 miles (1,300 km) from Prudhoe Bay on the North Slope of Alaska to Valdez on Prince William Sound. Trans-Alaska Pipeline in other Oxford dictionaries Definition of Trans-Alaska Pipeline in the US English dictionary