It can be worn over a shell or camisole, but most styles need no underpinnings.
From the orlandosentinel.com
Women wore lacier versions of this basic duo known as the camisole and drawers.
From the en.wikipedia.org
I have tried adding a white camisole over the bra, but this gets bulky and hot.
From the sacbee.com
It's priced from $35 wholesale for a camisole to $110 for a long kimono dress.
From the courier-journal.com
No need to show cleavage for this crowd, so wear a camisole if it's an issue.
From the chron.com
A camisole is a sleeveless undergarment for women, normally extending to the waist.
From the en.wikipedia.org
A camisole is a sleeveless shirt for women, normally extending to the waist.
From the en.wikipedia.org
Wear it to bed, to yoga, or under that low-cut shirt in lieu of a camisole.
From the charlotteobserver.com
As an alternative to the full slip, a waist slip with a matching camisole can be worn.
From the en.wikipedia.org
More examples
A short sleeveless undergarment for women
A short negligee
Camisole is a sleeveless undergarment for women, normally extending to the waist. The camisole is usually made of satin, nylon, or cotton.
(Camisoles) A form fitting top with thin spaghetti-style straps with coverage to the waist. Today it is a multifunctional top acting as an undergarment as well as a fashionable top.
(Camisoles) Extend from the bust to the waist and look much like a fitted tank top with spaghetti straps. Most camisoles (camis) are made from a seamless stretch microfiber and offer a clingy, contoured fit but little support. ...
A loose bodice worn over the corset (to protect it from soiling).
(n.) a woman's sleeveless undergarment, usually worn under a sheer blouse
A small shirt, halter top-like undergarment
1820's on - short sleeved or sleeveless underbodice (usually white) worn over stays to protect the tight fitting dress (4)