A petticoat or underskirt is an article of clothing, a type of undergarment worn under a skirt or a dress. Its precise meaning varies over centuries and between countries.
According to the Oxford English Dictionary, in current British English, a petticoat is "a light loose undergarment ... hanging from the shoulders or waist". In modern American usage, "petticoat" refers only to a garment hanging from the waist. They are most often made of cotton, silk or tulle. Without petticoats, skirts of the 1850s would not have the volume they were known for.[1] In historical contexts (16th to mid-19th centuries), petticoat refers to any separate skirt worn with a gown, bedgown, bodice or jacket; these petticoats are not, strictly speaking, underwear, as they were made to be seen. In both historical and modern contexts, petticoat refers to skirt-like undergarments worn for warmth or to give the skirt or dress the desired attractive shape.