noun
- An expedition sent by Thomas Jefferson to explore the northwestern territories of the United States; led by Meriwether Lewis and William Clark; traveled from St. Louis to the mouth of the Columbia River from 1803 to 1806. .
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). Lewis and Clark Expedition. Retrieved September 22, 2026, from http://smartdefine.org/lewis_and_clark_expedition/definitions/1223781 |
| Chicago | WordNet. 2010. "Lewis and Clark Expedition" http://smartdefine.org/lewis_and_clark_expedition/definitions/1223781 (accessed September 22, 2026). |
| Harvard | WordNet 2010, Lewis and Clark Expedition, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/lewis_and_clark_expedition/definitions/1223781>. |
| MLA | WordNet. "Lewis and Clark Expedition" 23 October 2010. Web. 22 September 2026. <http://smartdefine.org/lewis_and_clark_expedition/definitions/1223781> |