A petticoat or underskirt is an article of clothing; specifically an undergarment to be worn under a skirt or a dress. The petticoat is a separate garment hanging from the waist (unlike the chemise).
In historical contexts (sixteenth to mid-nineteenth 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 fashionable shape. In this context a petticoat may be called a waist slip or underskirt (UK) or half slip (US), with petticoat restricted to extremely full garments. Petticoat can also refer to a full-length slip in the UK, although this usage is somewhat old-fashioned.
Petticoat is the standard name in English for any underskirt worn as part of non-Western clothing such as the lehenga with the sari.
The practice of wearing petticoats as undergarments was well established by 1585. Petticoats were worn throughout history by women who wanted to have the currently fashionable shape created by their clothing. The petticoats, if sufficiently full or stiff, would hold the overskirt out in a pleasingly domed shape and give the impression of a smaller waist than the wearer actually had. It would also complement the desired large bust.
Eu choro de cara suja,
meu papagaio o vento carregou
E lá se foi prá nunca mais,
linha nova que pai comprou
Dança Maria, Maria,
lança seu corpo jovem pelo ar
Ela já vem, ela virá,
solidária nos ajudar
Não fique triste, menino,
a linha é tão fácil de arranjar
Venha aqui, venha escolher,
papagaio de toda cor
A casa estava escura,
no vento forte a chuva desabou
A luz não vem, eu aqui estou,
a rezar na escuridão e só
Venho no vento da noite,
na luz do novo dia cantarei
Brilha o sol, brilha luar,
brilha a vida de quem dancei