Louisiana-purchase definition

(place) Land bought by the U.S. from France in 1803 for $15,000,000: it extended from the Mississippi to the Rocky Mountains & from the Gulf of Mexico to Canada.
proper name
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A former territory of the western United States extending from the Mississippi River to the Rocky Mountains. It was purchased from France on April 30, 1803, for $15 million and officially explored by the Lewis and Clark expedition (1804–1806).
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