Definition of the Gadsden Purchase from the Oxford Advanced Learner's Dictionary

 

the Gadsden Purchase

 
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an area in the south-west US that was bought from Mexico for $10 million in 1853. It was 29 640 square miles/76 768 square kilometres and became part of the later states of Arizona and New Mexico. The agreement to buy the land was made by James Gadsden (1788-1858), the US ambassador (= senior government representative) in Mexico.