re·ver·sal /rɪˈvɝsəl/
 翻轉,顛倒,反轉
 re·ver·sal /rɪˈvɝsəl/ 名詞
 顛倒,反轉,逆轉
 reversal
 反轉
 Re·ver·sal a.  Intended to reverse; implying reversal. [Obs.]
 Re·ver·sal, n.
 1. The act of reversing; the causing to move or face in an opposite direction, or to stand or lie in an inverted position; as, the reversal of a rotating wheel; the reversal of objects by a convex lens.
 2. A change or overthrowing; as, the reversal of a judgment, which amounts to an official declaration that it is false; the reversal of an attainder, or of an outlawry, by which the sentence is rendered void.
 ◄ ►
 reversal
      n 1: a change from one state to the opposite state; "there was a
           reversal of autonomic function"
      2: an unfortunate happening that hinders of impedes; something
         that is thwarting or frustrating [syn: reverse, setback,
          blow, black eye]
      3: turning in an opposite direction or position; "the reversal
         of the image in the lens" [syn: turn around]
      4: a decision to reverse an earlier decision [syn: change of
         mind, flip-flop, turnabout, turnaround]
      5: a judgment by a higher court that the judgment of a lower
         court was incorrect and should be set aside [ant: affirmation]
      6: turning in the opposite direction [syn: reversion, reverse,
          turnabout, turnaround]
      7: the act of reversing the order or place of [syn: transposition]
      8: a reversal in attitude or principle or point of view; "an
         about-face on foreign policy" [syn: about-face, volte-face,
          policy change]