CHANGE FROM ONE THING TO ANOTHER formal a change to a completely opposite opinion or plan of action 〔意见、行动计划等的〕完全改变，大转变，180度大转弯SYN U-turn
Examples from the Corpus
volte-face• By the end of the year, though, he appeared to have performed a volte-face.• One is the difficulty of explaining Hastings' apparent volte-face.• This explains the miraculous volte-face that took place in 1868.