turnabout

noun

1. (countable, uncountable)The act of turning about so as to face in the opposite direction.

   “It is a fine dance, fast and intricate, with many turnabouts. The women's long black hair swirls as they turn; […]”

2. (countable, uncountable)A change from one thing to its opposite, or from a situation to the reverse.

   “Any idea of how many transsexuals there are in America? About 10,000, some 1500 of whom have changed their sex by surgery. The male-to-female turnabout costs $3000-$5000, while the female-to-male process runs up to $12,000.”

3. (countable, uncountable)A reversal of a decision or opinion etc; a change of mind or flip-flop.
4. (countable, uncountable)A three-point turn or any similar act of turning around, with the same outcome, regardless of how many repeated forward-reverse maneuvers it takes.
5. (countable, uncountable)A merry-go-round.