stepper Syllabification: (step·per)Pronunciation: /ˈstepər/Definition of stepper noun 1an electric motor or other device that moves or rotates in a series of small discrete steps. 2a portable block used in step aerobics. 3 dated a horse with a brisk, attractive walking gait:choosing a showy gray stepper for May’s broughamstepper in other Oxford dictionaries Definition of stepper in the British & World English dictionary