Wiktionary
stepping back
n. (context rail transport English) a system to decrease turnaround time at terminal stations where a second driver enters the rear cab of an arriving train and departs driving the train from that end while the first driver is walking the length of the platform ready to take over the subsequent departure. vb. (present participle of step back English)
Usage examples of "stepping back".
Byrne said, letting go of the older man's jacket and stepping back, away from him.
Luke told her, shifting his lightsaber to his left hand and stepping back to her side.
In stepping back, he fell and lay on the ground almost at my feet.
Nestus had not meant to kill him and he dropped the body, stepping back horrified.