Search Dictionary
Definition of columbia river
columbia river
• noun
1
North American The largest river in the Pacific Northwest region of North America, rising in the Rocky Mountains of British Columbia, Canada, flowing through the US state of Washington, forming much of the border between Washington and Oregon, and emptying into the Pacific Ocean.
Usage Trend
Historical frequency of usage in published text.
180019102020
Data source: Google Books Ngram Viewer
Cite this Entry
Wordmom. (2026). Definition of Columbia river. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/columbia-river