Definition: Meaning of, Lewis and Clark in English to English dictionary.
Pronunciation:/ ˈluːɪs ənd;(ə)n;and klɑːk /
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two EXPLORER s, Meriwether Lewis (1774-1809) and William Clark (1770-1838), who travelled across North America from 1804 to 1806, going up the Missouri River and over the Rocky Mountains to the Pacific coast. They drew maps and gathered information about the Native American people who lived there.
an expedition sent by Thomas Jefferson to explore the northwestern territories of the United States; led by Meriwether Lewis and William Clark; travelled from St. Louis to the mouth of the Columbia River from 1803 to 1806