Definition of pony express
: a rapid postal and express system that operated across the western United States in 1860–61 by relays of horses and riders
First Known Use of pony express
PONY EXPRESS Defined for Kids
Definition of pony express for Students
: a rapid postal system that operated across the western United States in 1860–61 by changing horses and riders along the way
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Britannica.com: Encyclopedia article about "pony express"
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