Extending or going across a continent; as, a transcontinental railroad or journey.

a transcontinental route is a highway that crosses the entire United States from coast to coast. Examples include U.S. 20, U.S. 30, Interstate 10, Interstate 80, and Interstate 90.

Crossing a continent.

Transcontinental Inc. is a major Canadian newspaper and magazine publisher, as well as one of North America's largest printing firms.