The definition of a co worker is someone with whom you work or work alongside at your job.noun
An example of a co worker is a person who does a similar job as you who works in the next cubicle.YourDictionary definition and usage example. Copyright © 2013 by LoveToKnow Corp.
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
a fellow worker
Used by arrangement with John Wiley & Sons, Inc.