—n. 1. a step in a staircase.
2. stairsteps,stairs; a staircase.
3. a person or thing whose position, status, behavior, or the like suggests the shape or rise of the steps in a staircase: Their six children are stairsteps ranging from ages two to twelve.
—v.i. to occur or move in a regular pattern suggesting the steps of a staircase: housing units stairstepping down the hill to the edge of the lake.
—adj. suggesting or resembling the steps of a staircase, as in movement or shape: stairstep progress in improved appliance sales.Also,stair'-step".