From Longman Dictionary of Contemporary Englishcome/go/turn full circlecome/go/turn full circleto be in the same situation in which you began, even though there have been changes during the time in between Fashion has come full circle and denim is back. → full
Examples from the Corpus
come/go/turn full circle• A manufacturer of sun care products has just issued a report showing that the view on tanning has come full circle.• Now the pattern has turned full circle.• Only a classic endures, and sooner or later the fashion comes full circle.• The neo-colonial wheel has almost come full circle.• Thus the research has come full circle.• Today, society has evolved and the wheel has come full circle.• Now his fortunes are poised to turn full circle again.• The wheel has turned full circle in the past 25 years. 