/kerr"ee euhr, koor"-/ , n.
1. a messenger, usually traveling in haste, bearing urgent news, important reports or packages, diplomatic messages, etc.
2. any means of carrying news, messages, etc., regularly.
3. the conveyance used by a courier, as an airplane or ship.
4. Chiefly Brit. a tour guide for a travel agency.
[ 1350-1400; cour ( r ) ier corriere, equiv. to corr ( ere ) to run ( currere ) + -iere -arius -ARY; r. ME corour cor ( i ) our, OF coreor curritor runner; see CURRENT, -TOR ]