Senses
掉头/ 掉頭 to turn around
To turn a vehicle around and go in the opposite direction; to make a U-turn.
掉头/ 掉頭 to turn one's head
To turn one's head around to look back, or to turn away and leave.
掉头/ 掉頭 to shake one's head
(Literary) to shake one's head, often indicating refusal or lack of knowledge.
掉头/ 掉頭 to be beheaded
(Colloquial) to be decapitated or executed.
掉头/ 掉頭 to lose interest
(Colloquial) to lose interest in something or change one's mind.