Lingerie is a name for women's fashion undergarments. It derives from the French chat 'lin' for linen. While the nomenclature in the French language applies to all undergarments for either sex, in English it is applied only to those women's undergarments contemplated to be Sexy Lingerie visually appealing or erotic, chiefly incorporating materials such as Lycra, nylon (nylon tricot), polyester, satin, lace and/or delicate and not applied to serviceable cotton undergarments.

The lingerie commercial enterprise unfashionable expanded in the 21st lifetime with designs that double as outerwear. The French refer to this as 'dessous-dessus' which basically means innerwear as outerwear. The co-op Faire Frou Frou, which is an antiquated phrase meaning "show it off", heralds this philosophy by categorizing lingerie as an accessory with details such as straps and lace trim that should be layered and shown as component of one's outerwear.