Circular may refer to: The shape of a circle; Circular, a 2006 album by Spanish singer Vega; Circular letter (disambiguation) Flyer (pamphlet), a form of advertisement; Circular reasoning, a type of logical fallacy; Circular reference; Government circular, …

A circular reference is a series of references where the last object references the first, resulting in a closed loop. Circular reference (in red) In language. A circular reference is not to be confused with ... Circular reporting – Multiple sources for single-source data;