the large region of North America sold by Napoleon I to the US in 1803 for 15 million dollars: consists of the W part of the Mississippi basin. Area: about 2 292 150 sq km (885 000 sq miles)
Louisiana Purchase in American English
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