Lingerie refers to fashionable and often alluring undergarments worn by women. Typically the design will be more exotic/risque, or is made out of special fabrics, such as silk.
Most undergarment tags are set to imply lingerie (with the notable exception of panties, a tag so ubiquitous as to make the implication of little use).
For everyday undergarments, see underwear.
source: danbooru wiki