Wiktionary
alt. A stool of various designs that may have one or more steps that fold away underneath the seat when not in use. n. A stool of various designs that may have one or more steps that fold away underneath the seat when not in use.
WordNet
n. a stool that has one or two steps that fold under the seat
Usage examples of "step stool".
Climbing the makeshift step stool, I molded the plastique into depressions in the roughly hewn rock directly above each of the elevator openings.
When she stood on the first step of the two-step stool, the top of her head was only ten inches from the skylight.
While Miss Office Professional typed a letter, I snapped open a step stool and began to clip leaves off the hanging plant beside her desk.
I glanced over my shoulder at the step stool on the far side of the porch door, remembering the major's injunction.
Using the two-step stool, she climbed upon the bed and stretched out between the cool, fragrant sheets.
She'd even made herself a small step stool so her elbows didn't bang the insides of the tub, which Brenna viewed as a relieving sign of both her initiative and her intent to stay with the work.
Then, with Rya's help, I carried eight two-by-fours from the nearest stack of supplies and laid them on the floor, crossed like Lincoln Logs, to form a step stool of sorts.