Meaning of “U-turn” - Learner’s Dictionary

U-turn

noun [ C ] uk us /ˈjuːtɜːn/
VEHICLE

a change of direction that you make when driving in order to travel in the opposite direction

DECISION

a complete change from one opinion or plan to an opposite one:

the government's U-turn on economic policy

(Definition of “U-turn” from the Cambridge Learner’s Dictionary © Cambridge University Press)