2.verbTo stop what one is doing and evaluate the current situation.
"Perhaps we should step back for a second and think about solving this problem a different way."
3.verbTo prevent oneself from becoming emotionally involved in a certain situation.
"As a therapist sometimes you have to step back from your clients' lives."
4.verb(of a driver at a terminal station) to depart driving the train following the train they arrived into the station driving, so as to decrease service turnaround time.