Meaning

noun someone who imports or exports without paying duties

noun someone who travels on foot by running

noun a person who is employed to deliver messages or documents

originFrom Middle English rennere, rynner, urnare, equivalent to run + -er. Cognate with Old Norse rennari (“runner; messenger”). Displaced earlier Middle English runel (“runner”), from Old English rynel (“runner”; also “messenger, courier”). ((botany) a long stolon sent by a plant): Compare typologically Russian побе́г (pobég) (akin to бежа́ть (bežátʹ)).

Etymology from Wiktionary, CC BY-SA 3.0