A petticoat stiffened and expanded by means of hoops of ratan, whalebone, or steel. Also hoop-petticoat.(noun)
The Century Dictionary (Public Domain)
Use "hoop-skirt" in a sentence
"A tutorial video aimed at brides, or maybe wedding planners on the mechanics of wearing a hoop-skirt."
"She wore a short, girlish dress that came to a little below her shoe-tops, a pale-figured lavender and white silk, with a fluffy hoop-skirt of dainty laced-edged ruffles, against which tiny bows of lavender stood out in odd places."
"All of the clothing dated to the last century at least, from the era of the bustle and the hoop-skirt, and had been thriftily packed away, with springs of lavender so old it crumbled when she touched it."