- The definition of a milk run is slang for a routine mission that has a low chance of danger.
An example of a milk run is a routine military procedure such as delivery of mail in a non-combat situation.
milk run definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Slang a routine mission, as of a bomber aircraft, that is not expected to be dangerous
milk run definition by American Heritage Dictionary
A routine trip involving stops at many places.