step back

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb Used other than as an idiom: see step,‎ back.
• verb idiomatic To stop what one is doing and evaluate the current situation.
• verb idiomatic To prevent oneself from becoming emotionally involved in a certain situation.
• verb rail transport to depart driving the train following the train they arrived into the station driving, so as to decrease service turnaround time.