full circle

adverb

Pronunciation: /ˌfʊl ˈsɜː.kəl/ / /ˌfʊl ˈsɝ.kəl/

Through a rotation or revolution that ends at the starting point.
“Thus, patterns whose parts move about a point axis are called finite, because eventually the parts will move full circle to superimpose upon the original starting point […]”
“Little has been heard lately of Gwynedd Council's campaign for the line to be upgraded for freight use, enabling it to haul slate waste from Blaenau Ffestiniog for export to Europe. [...] It would mean things have gone full circle, for the line's original purpose was transporting slate from Ffestiniog quarries to a quay at Deganwy for shipping abroad.”
Through a cycle of transition, returning to where one started after gaining experience or exploring other things.
“Now the wheel is turning back full circle.”
“He'd begin with a premise and wrap it up at the end, full circle, the moral of the story hanging on the last word of the last line.”

Used other than figuratively or idiomatically: see full, circle.
An arc of 360 degrees.
“Arcs are measured in degrees, with 360° in the full circle.”
A full turn back to the original direction or orientation. a point arrived at which is the same point at which it began;
“He cackled confidentially, like he knew more than he was telling, then threw his head back and crowed once and strutted in a full circle like a rumpled old rooster.”
A full turn back to the original direction or orientation. a point arrived at which is the same point at which it began;