| U | |
| Undergarment | A garment designed to be worn under another piece of clothing. This is also referred to as lingerie or underwear. |
| Under Liner, Underliner | An underliner is any undergarment that begins at the waist and extends down past the mid-calf. An underliner can be loose fitting and worn as a slip for unlined pants, or it can be form-fitting to slim and smooth the legs. |
| Underwear |
Clothing or an article of clothing worn next to the skin and under other clothing. Examples of underwear include: briefs, boxers, panties, bras etc. |
| Under Wire, Underwire | A strip of flatted steel wire (or other man-made material) sewn into the underside of each cup of a bra, used for support and shape. |
| Under Wire Bra, Underwire Bra | An under wire bra has a wire that runs under the cups for extra support. |
| Unfinished Edges, Unfinished Hem | In a piece of clothing, the edges of the fabric are "unfinished" or not hemmed. This is usually done with lightweight slinky knits which need to drape softly or give a lightweight, floaty look. Finishing the edge of the slinky knit would add weight and bulk, completely changing or ruining the intended look. |
| Unmentionable, Unmentionables |
This means lingerie or underwear. This phrase became popular in the 19th century when it was considered improper to mention the name of an undergarment by its actual name in public. |
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Utility Weight, Service Weight |
A hosiery product that will give long life and designed for people in a physical and active working situation were high stress is placed on the hosiery. Usually made with greater than 30 Denier nylons thread. |