Pronunciation: (step'in"), [key]
(of garments, shoes, etc.) put on by being stepped into.
1. step-ins,panties, esp. bias-cut panties with wide legs worn by women in the 1920s and 1930s.
2. any step-in garment.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.