warmundergarment
nounUK /wɔːm ˈʌndəˌɡɑːmənt/
US /wɔːrm ˈʌndərˌɡɑːrmənt/
A warm piece of clothing you wear under your other clothes to stay cozy.
She put on a warmundergarment before going out into the snow.
OTHER MEANINGS
2. A heated inner lining sewn into a jacket for extra warmth.
The parka's warmundergarment kept him comfortable all day.
3. Any soft, insulating layer worn closest to the skin in cold weather.
Wool makes an excellent warmundergarment for winter hikes.
4. A cozy underlayer for a baby's winter outfit.
The baby wore a warmundergarment beneath her snowsuit.