runner (n.) Look up runner at Dictionary.com
c. 1300, "messenger on foot," agent noun from run (v.). Meaning "one who runs" is early 14c. Meaning "smuggler" first recorded 1721; sense of "police officer" is from 1771. Meaning "rooting stem of a plant" is from 1660s; that of "embroidered cloth for a table" is from 1888.