1.  turnabout(n = noun.cognition) change of mind, flip-flop, reversal, turnaround - a decision to reverse an earlier decision;
is a kind of deciding, decision making
has particulars: afterthought, reconsideration, rethink, second thought

2.  turnabout(n = noun.act) reversal, reverse, reversion, turnaround - turning in the opposite direction;
is a kind of change of direction, reorientation
has particulars: about-face, about turn, u-turn