[n] turning in an opposite direction or position; "the reversal of the image in the lens"
[v] get better; "Her performance in school picked up"
[v] cause to get better; "The new stategy turned around sales"; "The tutor turned around my son's performance in math"
[v] turn abruptly and face the other way; also metaphorically; "He turned around to face his opponent"; "My conscience told me to turn around before I made a mistake"