Used other than figuratively or idiomatically: see full, circle.
By extension, when a debate or discussion comes "full circle" when the participants end up going over points already discussed, even though no literal change of orientation is involved. the point at which effort has resulted in no progress.
𝌇
An arc of 360 degrees.
A full turn back to the original direction or orientation. a point arrived at which is the same point at which it began;
Through a cycle of transition, returning to where one started after gaining experience or exploring other things.
Through a rotation or revolution that ends at the starting point.
A round angle; a full circle.