A transcontinental journey or route goes from one side of a continent to the other. In American English, transcontinental usually means from one side of the United States to the other. in mid-nineteenth-century America, before the transcontinental railroad was built. crossing a continent
Extending or going across a continent; as, a transcontinental railroad or journey
spanning or crossing or on the farther side of a continent; "transcontinental railway"; "transcontinental travelers"; "a transcontinental city"