• Directory of Internet terms
  • Churn — Rate of change, usually high; instability caused by frequent unplanned and hard to control changes. The word evolved from its use to mean agitation in such devices as butter churns and ice cream churns. In researching the term, I found modern examples of uses of the term to refer to changes in a customer base for wireless telephone, changes in routing patterns between ISPs, changes in membership of an e-mail discussion list, changes in click-through rates in web ads, rates of change in web pages, and prolonged hard disk activity.