cour·i·er / ˈkoŏrēər; ˈkərēər/ • n. 1. a messenger who transports goods or documents, in particular: ∎  a company or employee of a company that transports commercial packages and documents. ∎  a messenger for an underground or espionage organization.2. a person employed to guide and assist a group of tourists.• v. [tr.] (often be couriered) send or transport (goods or documents) by courier.

courier running messenger XVI; servant employed to make travelling arrangements XVIII. — F. †courier, (also mod.) courrier — It. corriere, f. corre :- L. currere run (see CURRENT).