circular letter

n.Correspondence intended to be distributed widely throughout an organization or group to disseminate information in a thorough and consistent manner.


Yates 1989, p. 66 Orders or circular letters, issued (in printed form) by the U.S. Army beginning in 1813, allowed a military commander to announce a change in the chain of command, to give orders, or to establish procedures for all or some of the men under his command. Another influence on widely disseminated announcements, suggested by the use of the term circular or circular letter for such documents, is the advertising circular, a form of external communication.