(idiomatic) A dangerous person, who is not to be messed with.

A stone that can be stepped on in crossing something, especially a marsh or creek. / (idiomatic) Something used as a way to progress to something or somewhere else.

Alternative form of stepping stone

plural of stepping motor

An electromagnetic actuator that converts digital pulses of input into analog rotary motion, the degree of rotation being proportional to the number of pulses received.

plural of stepping stone

present participle of goose-step

present participle of step back

(rail transport) 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.

An electromechanical device which connects an input to one of a number of outputs according to how many electrical pulses it has received on its input.