2. Verb. (idiomatic) To stop what one is doing and evaluate the current situation. ¹
3. Verb. (idiomatic) To prevent oneself from becoming emotionally involved in a certain situation. ¹
4. Verb. (rail transport 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. ¹
¹ Source: wiktionary.com