Definition of courier noun from the Oxford Advanced American Dictionary

 

courier

 noun
noun
NAmE//ˈkəriər//
 
, NAmE//ˈkʊriər//
 
 
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a person or company whose job is to take packages or important papers somewhere We sent the documents by courier.
courierverbcourier something
 
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Courier that letter—it needs to get there today (= send it by courier ).