Transcontinental means crossing an entire continent from one side to the other. The word combines trans, meaning “across,” with continental, meaning “relating to a continent.”

When the first transcontinental railroad was completed in 1869, it connected the eastern and western United States. Before that railroad, traveling from New York to California meant either a dangerous six-month wagon journey or a long sea voyage around South America. The transcontinental railroad reduced the trip to less than a week, transforming American commerce and settlement.

A transcontinental flight crosses a continent, like flying from Los Angeles to New York. A transcontinental highway, like Route 66 or Interstate 80, stretches across the entire country. The Trans-Siberian Railway is a transcontinental railroad that crosses Russia, covering over 5,700 miles.

The word captures something ambitious and impressive: transcontinental projects require enormous planning, resources, and determination. Building a railroad across mountains, deserts, and plains meant solving countless engineering challenges. When you hear transcontinental, think of journeys and connections that span vast distances, linking people and places separated by thousands of miles.