adjective
transcontinental
tranz-kahn-tih-NEN-tuhl/ˌtrænzˌkɑːntɪˈnentl/
Crossing or spanning a continent.
The map shows a transcontinental railway joining the two coasts.

Etymology
Continental means relating to a continent; adding trans- makes the relationship one of crossing. The word therefore describes something extending across the landmass, not merely situated somewhere within it.
In context
At the start of the Civil War, Abraham Lincoln launched America's dream of connecting the country by rail. The first transcontinental railroad was the most ambitious engineering challenge of the 19th century.
More examples
- They took a transcontinental flight.
- The book follows a transcontinental expedition.
- A transcontinental network linked the coastal cities.
Forms
transcontinental
Similar words
- intercontinental
- Intercontinental means between continents; transcontinental means across a continent.
- continental
- Continental concerns a continent; transcontinental specifies spanning it.