In this context, "West" refers to the western region of the United States. It typically includes states beyond the Mississippi River, such as California, Oregon, Texas, etc., but specific definitions can vary depending on historical context.
Related terms
Frontier: Refers to a geographical area at or beyond the edge of settled territory. The American frontier moved steadily westward throughout history.
Transcontinental Railroad: A railroad line completed in 1869 that connected the East Coast with the West Coast, facilitating transportation and settlement across vast distances.
Pioneer: A person who is among the first settlers or explorers of a new area or region. Pioneers played a significant role in expanding westward during American history.