express mail 1
noundomain: communication
Princeton WordNet [ver.3.1]
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EnglishDefinition
mail that is distributed by a rapid and efficient system
Hypernym
mail 1
noun
the bags of letters and packages that are transported by the postal service
EnglishHyponym
pony express 1
noun
express mail carried by relays of riders on horseback; especially between Missouri and California around 1860
