Broadly speaking, a regional arrangement in the sphere of international politics may be described as an association of states, based upon location in a given geographic area, for the safeguarding or promotion of the participants.
Furniss, Edgar S. Jr.
Naval War College Review: Vol. 12
, Article 3.
Available at: https://digital-commons.usnwc.edu/nwc-review/vol12/iss1/3